Category Archives: Intranasal Ketamine

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NOVA Health Recovery | Alexandria, Va 22306 | Call for esketamine and nasal ketamine as well as IV Ketamine for depression, PTSD, anxiety  703-844-0184 < Link

Ketamine Virginia Link

NOVA Health Recovery | Alexandria, Va 22306 | Call for esketamine and nasal ketamine as well as IV Ketamine for depression, PTSD, anxiety  703-844-0184 < Link

Ketamine Virginia Link



Ketamine Works as a Fast-Acting Antidepressant, But the Full Effects Are Still Unknown

Ketamine Works as a Fast-Acting Antidepressant, But the Full Effects Are Still Unknown

etamine leads something of a double life, straddling the line between medical science and party drug. Since it’s invention in the early 1960s, ketamine has enjoyed a quiet existence as a veterinary and pediatric anesthetic given in high doses. But in a second, wilder life, ketamine’s effects at lower doses—a profound sense of dissociation from self and body—became an illicit favorite among psychedelic enthusiasts. Pioneering neuroscientist John Lilly, who famously attempted to facilitate communication between humans and dolphins, used the drug in the late 1970s during experiments in sensory deprivation tanks. By the 1990s, the drug had made its way to the dance floor as “special K.”

More recently, ketamine has taken on a third, wholly unexpected role. Since the early 2000s, the drug has been studied as a uniquely powerful medication for treating severe depression and obsessive-compulsive disorder (OCD). When given as an intravenous infusion, ketamine can lift symptoms of depression and OCD from patients who fail to respond to common antidepressants like Prozac and even resist treatments like electroconvulsive therapy (ECT).

Exactly how ketamine produces antidepressant effects remains unclear, however. Antidepressants like Prozac are Serotonin Reuptake Inhibitors (SSRIs) that increase levels of the neurotransmitter serotonin in the brain, which is believed to boost mood. Ketamine’s main mechanism of action to produce dissociative anesthetic effects, on the other hand, depends on another neurotransmitter, glutamate.

“The prevailing hypothesis for ketamine’s antidepressant effect is that it blocks a receptor (or docking port) for glutamate,” says Carolyn Rodriguez, a professor of psychiatry at Stanford who has conducted some of the pioneering research into ketamine as an OCD treatment.

However, new research suggests that ketamine’s influence on glutamate receptors, and specifically the NMDA receptor, may not be the sole cause of its antidepressant effects. According to a recent study in the American Journal of Psychiatry by Rodriguez and her Stanford colleagues, ketamine might also activate a third system in the brain: opioid receptors.

Ketamine is known to bind weakly to the mu opioid receptor, acting as an agonist to produce a physiological response at the same site in the brain where narcotics like morphine exert their influence. It’s also known that opioids can have antidepressant effects, says Alan Schatzberg, a professor of psychiatry at Stanford and co-author of the new study.

It never made sense to Schatzberg that ketamine’s antidepressant effects were a result of blocking the glutamate receptors, as attempts to use other glutamate-blocking drugs as antidepressants have largely failed. The Stanford psychiatrist, who has spent his career studying depression, wondered if researchers were unknowingly activating opioid receptors with ketamine.

“You could test this by using an antagonist of the opioid system to see if you blocked the effect in people who are ketamine responders,” he says. “And that’s what we did.”

The researchers enlisted 12 subjects with treatment-resistant depression and gave them either an infusion of ketamine preceded by a placebo, or ketamine preceded by a dose of naltrexone, an opioid receptor blocker. Of those, seven subjects responded to the ketamine with placebo, “and it was very dramatic,” Schatzberg says, with depression lifting by the next day. “But in the other condition, they showed no effect,” suggesting it was the opioid receptor activity, not blocking glutamate receptors, that was responsible.

While opioid blockers prevented ketamine from activating the associated receptors, it did not block the drugs dissociative effects, suggesting dissociation alone won’t affect depression. “It’s not that, ‘hey, we’ll get you a little weird and you’ll get the effect,’” Schatzberg says.

The appeal of ketamine’s use as an antidepressant is clear enough. While more typical antidepressants may require six to eight weeks to produce benefits, ketamine works within hours.

“Our patients are asked to hang in there until the medication and talk therapy takes effect,” says Carlos Zarate, chief of the experimental therapeutics and pathophysiology branch of the National Institute of Mental Health (NIMH) who was not associated with the new study. While waiting for traditional treatments to kick in, patients “may lose their friends or even attempt suicide.”

But the study linking ketamine to opioid activity means an extra dose of caution is required. While ketamine acts quickly, the anti-depressive effects of the drug only last for a few days to a week, meaning repeat doses would be needed in practice. Researchers and clinicians should consider the risk of addiction in long-term use, Schatzberg says. “You’re going to eventually get into some form of tolerance I think, and that’s not good.”

However, the new finding is based on just seven subjects, and it still needs to be replicated by other scientists, says Yale professor of psychiatry Greg Sanacora, who was not involved in the new study. And even if the trial is replicated, it would not prove ketamine’s opioid activity is responsible for its antidepressant effects.

“It doesn’t show that at all,” says Sanacora, who studies glutamate, mood disorders and ketamine. “It shows that the opioid system needs to be functioning in order to get this response.”

Sanacora compares the new study to using antibiotics to treat an ear infection. If you administered an additional drug that blocks absorption of antibiotics in the stomach, you would block treatment of the ear infection, but you wouldn’t conclude that antibiotics fight ear infections through stomach absorption—you just need a normally functioning stomach to allow the antibiotic to do its job. Similarly, opioid receptors might need to be functioning normally for ketamine to produce antidepressant effects, even if opioid activity is not directly responsible for those effects.

Complicating matters further, placebos often cause patients to experience less pain, but opioid blockers like naltrexone have been shown to prevent this response, according to Sanacora. It could be, he suggests, that all the apparatus of the clinic—the nursing staff, the equipment—exerted a placebo effect that is mediated by the brain’s opioid system, and the patients who received naltrexone simply did not respond to that placebo effect

“That’s a very important and powerful tool that is in all of medicine, not just in psychiatry,” Sanacora says. “And we know that the opiate system is involved, to some extent, in that type of response.”

It’s also possible, the researchers note in the paper, that ketamine’s action at the glutamate receptor is still important. “Ketamine acts in three distinct phases—rapid effects, sustained effects and return to baseline,” Rodriguez says. Opioid signaling may turn out to mediate ketamine’s rapid effects, while “the glutamate system may be responsible for the sustaining effects after ketamine is metabolized.”

One interpretation is that ketamine blocks glutamate receptors on neurons that are inhibitory, meaning they signal other neurons to fire fewer signals. By blocking these neurons from firing, ketamine may enhance glutamate activity in the rest of the brain, producing anti-depressive effects that persist after the opioid activity dies down.

“The reality is it’s in a gray zone,” Sanacora says. “This is just one small piece of a very large puzzle or concern that we really need to look at the data in total.”

That data is forthcoming. Results from a Janssen Pharmaceuticals clinical trial using esketamine, an isomer of ketamine, and involving hundreds of subjects will soon become public, according to Sanacora, who has consulted for the company. And at NIMH, Zarate and colleagues are studying hydroxynorketamine, a metabolite of ketamine that may provide the same benefits but without the dissociative side effects

Ketamine Works as a Fast-Acting Antidepressant, But the Full Effects Are Still Unknown

A new study suggests that ketamine activates the brain’s opioid receptors, complicating its use to treat clinical depression

Ketamine Syringe
Ketamine syringe, 10mg held by a healthcare professional. (Peter Cripps / Alamy Stock Photo)

By Jon KelveySEPTEMBER 11, 2018777110231.1K

Ketamine leads something of a double life, straddling the line between medical science and party drug. Since it’s invention in the early 1960s, ketamine has enjoyed a quiet existence as a veterinary and pediatric anesthetic given in high doses. But in a second, wilder life, ketamine’s effects at lower doses—a profound sense of dissociation from self and body—became an illicit favorite among psychedelic enthusiasts. Pioneering neuroscientist John Lilly, who famously attempted to facilitate communication between humans and dolphins, used the drug in the late 1970s during experiments in sensory deprivation tanks. By the 1990s, the drug had made its way to the dance floor as “special K.”

More recently, ketamine has taken on a third, wholly unexpected role. Since the early 2000s, the drug has been studied as a uniquely powerful medication for treating severe depression and obsessive-compulsive disorder (OCD). When given as an intravenous infusion, ketamine can lift symptoms of depression and OCD from patients who fail to respond to common antidepressants like Prozac and even resist treatments like electroconvulsive therapy (ECT).

Exactly how ketamine produces antidepressant effects remains unclear, however. Antidepressants like Prozac are Serotonin Reuptake Inhibitors (SSRIs) that increase levels of the neurotransmitter serotonin in the brain, which is believed to boost mood. Ketamine’s main mechanism of action to produce dissociative anesthetic effects, on the other hand, depends on another neurotransmitter, glutamate.

“The prevailing hypothesis for ketamine’s antidepressant effect is that it blocks a receptor (or docking port) for glutamate,” says Carolyn Rodriguez, a professor of psychiatry at Stanford who has conducted some of the pioneering research into ketamine as an OCD treatment.

However, new research suggests that ketamine’s influence on glutamate receptors, and specifically the NMDA receptor, may not be the sole cause of its antidepressant effects. According to a recent study in the American Journal of Psychiatry by Rodriguez and her Stanford colleagues, ketamine might also activate a third system in the brain: opioid receptors.

Ketamine is known to bind weakly to the mu opioid receptor, acting as an agonist to produce a physiological response at the same site in the brain where narcotics like morphine exert their influence. It’s also known that opioids can have antidepressant effects, says Alan Schatzberg, a professor of psychiatry at Stanford and co-author of the new study.

It never made sense to Schatzberg that ketamine’s antidepressant effects were a result of blocking the glutamate receptors, as attempts to use other glutamate-blocking drugs as antidepressants have largely failed. The Stanford psychiatrist, who has spent his career studying depression, wondered if researchers were unknowingly activating opioid receptors with ketamine.

“You could test this by using an antagonist of the opioid system to see if you blocked the effect in people who are ketamine responders,” he says. “And that’s what we did.”

The researchers enlisted 12 subjects with treatment-resistant depression and gave them either an infusion of ketamine preceded by a placebo, or ketamine preceded by a dose of naltrexone, an opioid receptor blocker. Of those, seven subjects responded to the ketamine with placebo, “and it was very dramatic,” Schatzberg says, with depression lifting by the next day. “But in the other condition, they showed no effect,” suggesting it was the opioid receptor activity, not blocking glutamate receptors, that was responsible.

While opioid blockers prevented ketamine from activating the associated receptors, it did not block the drugs dissociative effects, suggesting dissociation alone won’t affect depression. “It’s not that, ‘hey, we’ll get you a little weird and you’ll get the effect,’” Schatzberg says.

The appeal of ketamine’s use as an antidepressant is clear enough. While more typical antidepressants may require six to eight weeks to produce benefits, ketamine works within hours.

“Our patients are asked to hang in there until the medication and talk therapy takes effect,” says Carlos Zarate, chief of the experimental therapeutics and pathophysiology branch of the National Institute of Mental Health (NIMH) who was not associated with the new study. While waiting for traditional treatments to kick in, patients “may lose their friends or even attempt suicide.”

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A treatment that works within 24 hours? “That’s huge.”

A vial of ketamine. The drug is used primarily as an anesthetic but is gaining popularity as an effective antidepressant.
A vial of ketamine. The drug is used primarily as an anesthetic but is gaining popularity as an effective antidepressant. (Wikimedia Commons)

But the study linking ketamine to opioid activity means an extra dose of caution is required. While ketamine acts quickly, the anti-depressive effects of the drug only last for a few days to a week, meaning repeat doses would be needed in practice. Researchers and clinicians should consider the risk of addiction in long-term use, Schatzberg says. “You’re going to eventually get into some form of tolerance I think, and that’s not good.”

However, the new finding is based on just seven subjects, and it still needs to be replicated by other scientists, says Yale professor of psychiatry Greg Sanacora, who was not involved in the new study. And even if the trial is replicated, it would not prove ketamine’s opioid activity is responsible for its antidepressant effects.

“It doesn’t show that at all,” says Sanacora, who studies glutamate, mood disorders and ketamine. “It shows that the opioid system needs to be functioning in order to get this response.”

Sanacora compares the new study to using antibiotics to treat an ear infection. If you administered an additional drug that blocks absorption of antibiotics in the stomach, you would block treatment of the ear infection, but you wouldn’t conclude that antibiotics fight ear infections through stomach absorption—you just need a normally functioning stomach to allow the antibiotic to do its job. Similarly, opioid receptors might need to be functioning normally for ketamine to produce antidepressant effects, even if opioid activity is not directly responsible for those effects.

Complicating matters further, placebos often cause patients to experience less pain, but opioid blockers like naltrexone have been shown to prevent this response, according to Sanacora. It could be, he suggests, that all the apparatus of the clinic—the nursing staff, the equipment—exerted a placebo effect that is mediated by the brain’s opioid system, and the patients who received naltrexone simply did not respond to that placebo effect.

“That’s a very important and powerful tool that is in all of medicine, not just in psychiatry,” Sanacora says. “And we know that the opiate system is involved, to some extent, in that type of response.”

It’s also possible, the researchers note in the paper, that ketamine’s action at the glutamate receptor is still important. “Ketamine acts in three distinct phases—rapid effects, sustained effects and return to baseline,” Rodriguez says. Opioid signaling may turn out to mediate ketamine’s rapid effects, while “the glutamate system may be responsible for the sustaining effects after ketamine is metabolized.”

One interpretation is that ketamine blocks glutamate receptors on neurons that are inhibitory, meaning they signal other neurons to fire fewer signals. By blocking these neurons from firing, ketamine may enhance glutamate activity in the rest of the brain, producing anti-depressive effects that persist after the opioid activity dies down.

“The reality is it’s in a gray zone,” Sanacora says. “This is just one small piece of a very large puzzle or concern that we really need to look at the data in total.”

That data is forthcoming. Results from a Janssen Pharmaceuticals clinical trial using esketamine, an isomer of ketamine, and involving hundreds of subjects will soon become public, according to Sanacora, who has consulted for the company. And at NIMH, Zarate and colleagues are studying hydroxynorketamine, a metabolite of ketamine that may provide the same benefits but without the dissociative side effects.

The ultimate goal of all this research is to find a ketamine-like drug with fewer liabilities, and that aim is bringing researchers back to the fundamentals of science.

“For me, one of the exciting parts of this study is that it suggests that ketamine’s mechanism is complicated, it acts on different receptors beyond glutamate and is the start of this exciting dialogue,” Rodriguez says. “Sometimes great science raises more questions than answers.”



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NOVA Health Recovery | Alexandria, Va 22306 | Call for esketamine and nasal ketamine as well as IV Ketamine for depression, PTSD, anxiety  703-844-0184 < Link

Ketamine Virginia Link

What is interesting for the above articles is the Magnesium and copper components associated with Depression.

The most common biomarkers found are generally related to the regulation of lipid metabolism, control of immunoinflammatory response, control of vascular function, inter and intra-cellular communication. We additionally found that biomarkers related to nutrient sensing and proteostasis are related to LLD. Altogether, these studies suggest that there are core abnormalities, which are present in the first depressive episode, continue over mid-life and late-life, and are persistent even after successful antidepressant treatment. This view is consistent with the presence of biological “scars” in depression that render individuals with major depression , age, more vulnerable to systemic illness, disability, cognitive impairment and other negative health outcomes, which are not fully ameliorated despite successful antidepressant treatment . Robust machine learning techniques showed that three proteins (C-peptide, fatty acid-binding protein, and ApoA-IV) have a very high accuracy at discriminating individuals with remitted LLD compared to never depressed control participants. In fact, our study showed the highest discriminatory power of any previous studies, including those for schizophrenia, bipolar disorder or other common mental illnesses .

http://software.broadinstitute.org/gsea/msigdb

. LLD is associated with significantly higher levels of pro-inflammatory and lower levels of anti-inflammatory markers, reduced neurotrophic support, and higher levels of oxidative stress markers and activity of glycogen synthase kinase

I nflammation is a key pathway in the initiation and progression of coronary heart disease (CHD), and inflammatory biomarkers such as C-reactive protein (CRP) and interleukin-6 (IL-6) have shown consistent associations with incident CHD events (1). In recent years, myeloperoxydase (MPO) has drawn growing attention as a new inflammatory biomarker of CHD risk (2–4). Myeloperoxydase is an enzyme produced by activated leukocytes during the innate immune response that catalyzes the formation of reactive oxidant species. It is present in human atherosclerotic plaques and exhibits a variety of proatherogenic properties (5). Increased inflammation is a key mechanism through which several risk factors increase CHD risk (6). Depression is a risk factor for CHD (7), and whether increased inflammation is involved has attracted considerable interest (8). A role of inflammation in depression was first proposed by Smith in 1991 (9). Since then, several studies have reported a link between major depressive disorder (MDD) or depressive symptoms and a variety of inflammatory and immune biomarkers (10 –15). However, others have found no independent association (16) or mixed results (17–19), and one study even found lower levels of inflammatory biomarkers in depressed cardiac outpatients (20). It is increasingly recognized that the relationship between depression and inflammation is more complex than initially conceived (21). Depression may cause inflammation through altered neuroendocrine function and central adiposity (22). However, depression may also be a consequence of inflammation, since a pathogenic role of inflammatory cytokines in the etiology of depression has been described (23). Although given less consideration, a third possibility is that depression is a marker of some other underlying dimension that is separately linked to depression and inflammation. Recently, it has been proposed that such underlying factor could be a specific genetic makeup (24,25). Evidence for a common genetic substrate for depression and inflammation would be of substantial scientific and clinical interest, because it would suggest that a common biological pathway links these two conditions. We found that MDD is associated with higher levels of inflammation and that this association is particularly robust for MPO, an inflammatory biomarker that was never studied before in relation to depression. However, we also found evidence for genetic confounding in this association. Our results are consistent with the hypothesis that there is a common genetic substrate linking MDD and inflammation, suggesting that these two phenotypes share a common pathophysiological mechanism. MPO, Other Inflammatory Markers, and Depression Myeloperoxydase is an enzyme of the innate immune system, which exhibits a wide array of proatherogenic features (5,34). Myeloperoxydase is secreted upon leukocyte activation, contributing to innate host defenses. However, it also increases oxidative stress, thereby contributing to tissue damage during inflammation and atherogenesis. Myeloperoxydase generates numerous reactive oxidants that cause lipid peroxidation, posttranslational modifications to target proteins, and decrease of nitric oxide bioavailability, resulting in oxidation of LDL and apolipoprotein A1, protein carbamylation, and endothelial dysfunction (5,35,36). Transgenic mice containing the human MPO gene show significantly larger atherosclerosis buildup than the wild-type (34,37). In humans, individuals with total or subtotal MPO deficiency, a defect with a frequency of 1 in every 2000 to 4000 whites, are less likely to develop cardiovascular diseases, and those harboring a promoter polymorphism associated with a twofold reduction in MPO expression appear cardioprotected (5,38 – 40). Consistent with these proatherogenic properties, MPO has received growing attention as a novel risk marker for future cardiovascular events (2– 4). Oxidative stress has also been linked to neuronal degeneration in the central nervous system (41,42). Myeloperoxydase is both expressed and enzymatically active in the human brain (43,44) and is associated with Alzheimer’s disease (44). Previous studies have described abnormalities of oxidant-antioxidant systems in MDD suggestive of higher oxidative stress. For example, elevated levels of antioxidant enzymes, particularly superoxide dismutase (SOD), and biomarkers of oxidation, such as malondialdehyde, were found in plasma, red blood cells, or other peripheral tissues of acutely depressed MDD patients compared with control subjects (45– 47). In some cases (46,47), but not others (45), these abnormalities were reduced with antidepressant treatment. Superoxide dismutase coenzyme concentrations are also higher in postmortem brain tissue (prefrontal cortex) of MDD patients than in control brains (48).

MOOD FOOD Project

KETAMINE INFUSION CENTER VIRGINIA| 703-844-0184 | NOVA HEALTH RECOVERY | ARLINGTON, VA 22101 | ESKETAMINE PROVIDER Virginia | ESKETAMINE CENTER | ESKETAMINE DOCTOR | 703-844-0184 | ARLINGTON, VIRGINIA 22207 22213 | Nasal Spray Ketamine and the FDA approval| DR. SENDI | ESKETAMINE PROVIDER | NASAL SPRY KETAMINE THERAPY | KETAMINE FOR TREATMENT OF DEPRESSION, PTSD, ANXIETY | KETAMINE INFUSION CENTER | KETAMINE DEPRESSION | KETAMINE PTSD | EMAIL@NOVAHEALTHRECOVERY.COM | 2220 22182 23103 22039 20197 20184 22101 22102 22066 | CBD DOCTOR CBD CENTER | 703-844-0184 | FAIRFAX, VA 22034 | 22308 | ESKETAMINE LOUDON COUNTY, VA | ESKETAMINE ANNANDALE, VA | ESKETAMINE RICHMOND | ESKETAMINE VIRGINIA | KETAMINE SPRAY PROVIDER IN NORTHERN VIRGINIA 22308 | KETAMINE INFUSION CENTER | KETAMINE VIRGINIA | ESKETAMINE VIRGINIA | 703-844-0184 FOR AN APPOINTMENT | CBD PROVIDER | CBD CENTER | CBD VIRGINIA | DR. SENDI | Northern Virginia Ketamine | Ketamine Center

NOVA Health Recovery | Alexandria, Va 22306 | Call for esketamine and nasal ketamine as well as IV Ketamine for depression, PTSD, anxiety  703-844-0184 < Link

Ketamine Virginia Link

NOVA Health Recovery | Alexandria, Va 22306 | Call for esketamine and nasal ketamine as well as IV Ketamine for depression, PTSD, anxiety  703-844-0184 < Link

Ketamine Virginia Link

Ketamine-like depression treatment on track for FDA approval

 

Ketamine offers lifeline for people with severe depression, suicidal thoughtsThe drug is a close relative of ketamine, a powerful medication used in hospitals primarily as an anesthetic; recent scientific studies have also shown its potential with treatment-resistant depression and suicidal ideation. Ketamine is also used recreationally — and illegally — as a club drug known as Special K. It generates an intense high and dissociative effects.Esketamine, which is not FDA-approved for any conditions, targets a different brain pathway than approved antidepressants, many of which have been around for decades. It is expected to be used in combination with antidepressants, but the latter can take a month or two to take effect. Esketamine, on the other hand, might have an effect within hours or days, according to an FDA briefing document.The drug was designated as a breakthrough therapy in 2013, intending to “expedite the development and review of drugs for serious or life-threatening conditions,” the FDA says. First-line treatments don’t work for roughly 30% to 40% of patients with major depressive disorder, according to the briefing document.The FDA does not have to follow the recommendation of advisory committees, though it often does.

ERs 'flooded' with mentally ill patients with no place else to turn

ERs ‘flooded’ with mentally ill patients with no place else to turnHowever, the research behind esketamine has come under some criticism, with two of five key studies failing to meet their primary endpoints. Only one of these studies is a positive short-term trial, whereas most FDA-approved antidepressants are backed by at least two, according to the briefing document. But Janssen has maintained that the overall picture is positive.Adverse events tended to occur in the first two hours patients received the drug, including sedation, blood pressure increases and dissociation. For this reason, patients wouldn’t be able to pick it up at a local pharmacy; it would be given under the supervision of health care professionals who can keep an eye on the person during those first two hours.Because of the drug’s close relationship to ketamine, experts have also raised concerns about its potential for misuse and abuse. The clinical trials have not seen evidence of this risk, according to presentations made during the meeting.Advisory panelists also expressed concern that not enough long-term data was available to characterize the drug’s cognitive effects and other health impacts down the line.Get CNN Health’s weekly newsletter

There were six deaths of patients taking esketamine in trials, including three suicides, but FDA materials concluded “it is difficult to consider these deaths as drug-related.”The only current FDA-approved medication for treatment-resistant depression combines two other drugs already on the market. Other non-pharmaceutical treatments exist, such as electroconvulsive therapy.Janssen spokesman Greg Panico said no information about pricing would be available at this time. An FDA decision is expected in early March, he added.

 

CNN)A ketamine-like drug for treatment-resistant depression was backed by a US Food and Drug Administration advisory committee on Tuesday. If it is then approved by the FDA, the drug — called esketamine — may provide a new option for patients with major depressive disorder who have tried at least two other antidepressants without success.A panel of experts voted to endorse the drug, which is made in nasal spray form by the pharmaceutical company Janssen, a division of Johnson & Johnson. Fourteen members voted that the benefits outweighed the risk, with two opposed and one abstaining.

Ketamine offers lifeline for people with severe depression, suicidal thoughts
703-844-0184 | NOVA Health Recovery | Alexandria, Va 22306

Ketamine offers lifeline for people with severe depression, suicidal thoughtsThe drug is a close relative of ketamine, a powerful medication used in hospitals primarily as an anesthetic; recent scientific studies have also shown its potential with treatment-resistant depression and suicidal ideation. Ketamine is also used recreationally — and illegally — as a club drug known as Special K. It generates an intense high and dissociative effects.Esketamine, which is not FDA-approved for any conditions, targets a different brain pathway than approved antidepressants, many of which have been around for decades. It is expected to be used in combination with antidepressants, but the latter can take a month or two to take effect. Esketamine, on the other hand, might have an effect within hours or days, according to an FDA briefing document.The drug was designated as a breakthrough therapy in 2013, intending to “expedite the development and review of drugs for serious or life-threatening conditions,” the FDA says. First-line treatments don’t work for roughly 30% to 40% of patients with major depressive disorder, according to the briefing document.The FDA does not have to follow the recommendation of advisory committees, though it often does.

ERs 'flooded' with mentally ill patients with no place else to turn

ERs ‘flooded’ with mentally ill patients with no place else to turnHowever, the research behind esketamine has come under some criticism, with two of five key studies failing to meet their primary endpoints. Only one of these studies is a positive short-term trial, whereas most FDA-approved antidepressants are backed by at least two, according to the briefing document. But Janssen has maintained that the overall picture is positive.Adverse events tended to occur in the first two hours patients received the drug, including sedation, blood pressure increases and dissociation. For this reason, patients wouldn’t be able to pick it up at a local pharmacy; it would be given under the supervision of health care professionals who can keep an eye on the person during those first two hours.Because of the drug’s close relationship to ketamine, experts have also raised concerns about its potential for misuse and abuse. The clinical trials have not seen evidence of this risk, according to presentations made during the meeting.Advisory panelists also expressed concern that not enough long-term data was available to characterize the drug’s cognitive effects and other health impacts down the line.Get CNN Health’s weekly newsletter

There were six deaths of patients taking esketamine in trials, including three suicides, but FDA materials concluded “it is difficult to consider these deaths as drug-related.”The only current FDA-approved medication for treatment-resistant depression combines two other drugs already on the market. Other non-pharmaceutical treatments exist, such as electroconvulsive therapy.Janssen spokesman Greg Panico said no information about pricing would be available at this time. An FDA decision is expected in early March, he added.

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Ketamine Virginia Link

A Randomized Controlled Trial of Intranasal Ketamine in Major
Depressive Disorder

A Randomized Controlled Trial of Intranasal Ketamine in Major Depressive Disorder

Abstract
Background—The N-methyl-d-aspartate glutamate receptor antagonist ketamine, delivered via
an intravenous route, has shown rapid antidepressant effects in patients with treatment-resistant
depression. The current study was designed to test the safety, tolerability and efficacy of intranasal
ketamine in patients with depression who had failed at least one prior antidepressant trial.
Methods—Twenty patients with major depression were randomized and 18 completed two
treatment days with intranasal ketamine hydrochloride (50 mg) or saline solution in a randomized,
double-blind, crossover study. The primary efficacy outcome measure was change in depression
severity 24 hours following ketamine or placebo, measured using the Montgomery-Asberg
Depression Rating Scale. Secondary outcomes included persistence of benefit, changes in selfreports of depression, changes in anxiety, and proportion of responders. Potential
psychotomimetic, dissociative, hemodynamic, and general adverse effects associated with
ketamine were also measured.

Results—Patients showed significant improvement in depressive symptoms at 24 hours
following ketamine compared to placebo [t=4.39, p<0.001; estimated mean MADRS score
difference of 7.6 ± 3.7 (95% CI: 3.9 – 11.3)]. Eight of 18 patients (44%) met response criteria 24
hours following ketamine administration, compared to 1 of 18 (6%) following placebo (p=0.033).
Intranasal ketamine was well tolerated with minimal psychotomimetic or dissociative effects and
was not associated with clinically significant changes in hemodynamic parameters.

Conclusions—This study provides the first controlled evidence for the rapid antidepressant
effects of intranasal ketamine. Treatment was associated with minimal adverse effects. If
replicated, these findings may lead to novel approaches to the pharmacologic treatment of patients
with major depression

Intranasal ketamine has shown safety and efficacy as an anesthetic and analgesic agent (16–
20). In particular, intranasal ketamine has been successfully used in the treatment of
headache and pain in ambulatory patients (21–23). In one study, 50 mg of ketamine
administered intranasally was well tolerated and led to symptomatic improvement in chronic
pain (23). The objective of the current proof of concept clinical trial was to test the rapid
antidepressant effect of a single 50 mg administration of ketamine via an intranasal route in
patients with major depression who had failed to respond to at least one prior antidepressant
trial. Based on accumulating evidence supporting the efficacy and tolerability of ketamine
administered IV in depression, and prior research examining intranasal ketamine in pain, we
hypothesized that a dose of 50 mg, administered via an intranasal route, would be safe, well
tolerated and lead to a rapid reduction in depressive symptoms.

DISCUSSION
In the current study we found that a single dose of 50 mg of ketamine administered via
intranasal route was associated with a rapid antidepressant response in patients with major
depression who had failed at least one prior antidepressant trial. A significant antidepressant
effect of ketamine was detected as early as 40 min following administration and there was a
large difference in depression severity between the treatment conditions at the 24-hour
primary outcome (mean difference in MADRS score of 7.6 ± 3.7). In aggregate, there was
significant antidepressant benefit following ketamine compared to placebo over the full 7-
day assessment period, although when comparing individual time points the treatment
conditions no longer separated at 72 hours or 7 days. Ketamine was associated with
significant improvement in anxiety symptoms and self-reports of depressive symptoms at 24
hours. Intranasal ketamine was well tolerated with only very minimal increases in
dissociation, psychosis-like symptoms or hemodynamic parameters. This study provides the
first randomized, controlled evidence that intranasal ketamine is safe, well tolerated, and
effective for rapid reduction of depressive symptoms in patients with MDD and at least mild
treatment resistance.
In comparison with prior studies of ketamine administered IV (at a dose of 0.5 mg/kg) in
depression, our observed magnitude of antidepressant effect with intranasal administration
may be somewhat reduced. Murrough et al. reported a mean ketamine-placebo difference of
7.95 points (95% CI: 3.20–12.71) on the MADRS 24 hours following a single IV infusion
and a response rate of 64% (15). Response rates as high as 70% following IV administration
have been reported in some studies (11, 15), though other studies have reported response
rates from 50% to as low as 30% following IV ketamine (28, 29). Our mean drug-placebo
difference is in line with what has been previously reported (7.6 ± 3.7 points on the
MADRS), although the proportion of responders in our study may be somewhat lower at
44%. This lower proportion of treatment responders may be consistent with the lower blood
ketamine levels achieved in our study compared to levels previously reported following IV
administration. In our sample, the mean ketamine blood level was 72 ng/mL at 20 min and
84 ng/mL at 40 min. In contrast, mean ketamine levels reported following IV infusion
(0.5mg/kg) are approximately 150 ng/mL at 30 min and 200 ng/mL at 40 min. (27, 30, 31).
It is currently not known if efficacy equivalent to IV administration can be obtained by
intranasal administration in the case that comparable blood levels can be achieved.

We report a significant improvement in anxiety symptoms at 24 hours, assessed with the
HAM-A. Two studies of IV ketamine for bipolar depression reported a significant
improvement in anxiety symptoms measured with the HAM-A and a visual analog scale(27,
32). However, previous studies of patients with unipolar TRD have not described effects of
IV ketamine on anxiety, with the exception of an early RCT (11) and an open label study
(33) reporting significant improvement in psychic anxiety measured as an individual
symptom on the Hamilton Depression Rating Scale, and another open-label study reporting
significant decrease in anxiety symptoms on the HAM-A at +230 minutes (34).
Previous studies of IV ketamine in depression have reported elevations in measures of
psychotomimetic, dissociative and hemodynamic parameters (11, 13, 35). In our study, the
ketamine group experienced a very limited increase in dissociation at +40 min as measured
by the CADSS (mean 1.4 points; scale range 0–92). In comparison, Murrough et al. reported
a larger dissociative effect 40 min following ketamine administered IV [mean CADSS score
of 14.7 points (95% CI: 10.6–18.8)] (15). A similar pattern was observed for psychotic-like
effects measured using the BPRS+ (11, 15). We also observed comparatively small changes
in hemodynamic parameters. No patient met protocol criteria for interventions. Studies of IV
ketamine in depression have reported relatively greater changes in hemodynamic parameters
(mean systolic BP increase of 19.0 versus our 7.6 mmHg at +40mins relative to baseline)
(15). The reduced magnitude of acute behavioral and hemodynamic changes observed in the
current study may be consistent with the lower blood levels achieved compared to prior
studies with ketamine administered IV, as discussed above.
The bioavailability of ketamine administered via an intranasal route has been reported to be
between 25–50% (36). A study in healthy volunteers comparing administration methods
found intranasal ketamine bioavailability of 45%, higher than subligual, oral, or rectal
administration and found no significant differences in pharmacokinetics between
preparations, including injection (37). Additionally, this study found conversion to
norketamine was more similar between intranasal and injection than the other administration
methods, suggesting that first-pass metabolism is relatively absent with intranasal
administration. The area under the ketamine and norketamine plasma concentration-time
curves in that study was lowest for intranasal administration but was found to increase
almost linearly with doses from 25 to 50mg (37). In previous studies of IV ketamine in
depression, peak norketamine blood levels of approximately 20–50 ng/mL have been
reported (30, 31). In line with these findings, the mean norketamine level in our study was
46 ng/mL at 40 min.
We selected our dose of 50 mg largely based on a previous study using a similar design and
the same dose in patients with a chronic pain disorder (23). Based on an expected
bioavailability of intranasal ketamine between 25–50% (36), our dose may be approximately
equivalent to 0.15 – 0.34 mg/kg administered IV. Although this is lower than the standard
0.5 mg/kg IV frequently used in ketamine depression studies, we reasoned that this dose was
appropriate from a safety perspective given that the administration period in the current
study is relatively short (20 min versus 40 min or longer in IV studies). Clearly, much more
research is required in order to determine the optimal dose, duration, frequency and route of
administration of ketamine for depression

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Combined Treatment With Naltrexone, Ketamine Effective for Depressive Symptoms

Ketamine
Participants who received the naltrexone and ketamine regimen reported an improvement in depressive symptoms.

The effectiveness of ketamine as an antidepressant has been mitigated by concerns of possible abuse and suggestions that the antidepressant effects might be dependent on opiate receptor stimulation. However, results from a case series published in JAMA Psychiatry support the efficacy of combined naltrexone and ketamine treatment for depressive symptoms.

Investigators conducted an 8-week open-label pilot study of 5 patients with current major depressive disorder and alcohol use disorder. Patients received a single dose of injectable naltrexone (380 mg) 2 to 6 days prior to the first ketamine treatment, followed by 4 weeks of ketamine infusions (0.5 mg/kg once a week). Patients were assessed at baseline and at 4 hours after each infusion with the Montgomery Åsberg Depression Rating Scale. The primary outcome measure was a 50% or higher improvement from baseline Montgomery Åsberg Depression Rating Scale score. All patients were abstinent from alcohol for 5 days or longer prior to the initial ketamine infusion.

Combined treatment with naltrexone and ketamine was associated with a significant reduction in depressive symptoms. Three of 5 patients (60%) met response criteria following initial ketamine dose, and 5 of 5 patients (100%) met response criteria by the fourth dose, although 1 patient left the trial following 2 ketamine infusions. Symptoms improved by 57% to 92%, depending on the patient. In addition, 4 of 5 patients (80%) reported a reduction in alcohol craving and consumption per the Obsessive Compulsive Drinking Scale. Combined treatment was safe and well tolerated. No serious adverse events were reported in the trial.

These results challenge existing data that pretreatment with naltrexone may interfere with the antidepressant properties of ketamine. Research with a larger cohort is necessary to further investigate the efficacy of combination treatment with naltrexone and ketamine for depression.

Reference

Yoon G, Petrakis IL, Krystal JH. Association of combined naltrexone and ketamine with depressive symptoms in a case series of patients with depression and alcohol use disorder [published online January 9, 2019]. JAMA Psychiatry. doi: 10.1001/jamapsychiatry.2018.3990

Association of Combined Naltrexone and Ketamine with depressive symptoms in a case series of patients with depression and AUD

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NEW VARIATION OF KETAMINE TO BE APPROVED BY FDA FOR TREATMENT OF DEPRESSION

“The biggest breakthrough in depression treatment since Prozac”

  • 6 FEBRUARY 2019
New variation of ketamine to be approved by FDA for treatment of depression

Back in July of 2017, the world’s first ketamine trial for depression proved to be “incredibly effective” in curing elderly patients. The drug, often referred to as Special K, is a popular substance found clubland culture, but recent breakthrough studies and the development of chemical variations of ketamine has shown that the drug is a powerful tool that can help save lives and allow people to live life to the fullest potential.

According to Bloomberg, the Food and Drug Administration (FDA) has cleared the way for the first drug based on ketamine, from Johnson & Johnson, to gain approval as soon as March 2019. The ketamine variant, called esketamine, may very well become the first-ever rapid-acting antidepressant for suicidal patients and “treatment-resistant depression”. While physicians are still unsure about the long term effects of the drug and more trials need to be conducted in order to get to the root of its effectiveness, many doctors think esketamine may be “the biggest breakthrough in depression treatment since Prozac”.

The long-form story published in Bloomberg tells the stories of multiple people who have benefited from ketamine treatment and how the rapid development of this new miracle drug is being used to combat the skyrocketing rate of suicide in the United States (up 33 per cent in the last 20 years).

The drug esketamine provides “a quick molecular reset button for brains impaired by stress or depression”. Initially developed as an intravenous drug, Johnson & Johnson has developed a nasal solution that has the same effect. The initial study of the drug involved 68 people at high risk that were all antidepressants and other treatment – no placebos were used on actively suicidal patients. Of those who were given esketamine, 40 per cent were deemed “no longer at risk of killing themselves within 24 hours”.

As physicians and investors race to find out more about this supposed miracle drug, concerns remain that a new abuse crisis – similar to that of the current opioid crisis – may arise following federal approval of the substance.

Check out the captivating story behind these successful studies here

Learn more about ketamine’s colorful clubland history here.

Find out how we survived an unconventional, silly, hilarious and definitely brilliant musical about ketamine here.

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Is Ketamine Safe and Effective for Depression?

The anesthetic ketamine, used in both humans and animals, is perhaps best known as an illegal party drug due to its hallucinogenic effects. However, a growing body of research indicates that the drug may have a powerful new medical use: as a fast-acting antidepressant without the side effects seen in most prescription antidepressants.

As Nature reports, in many clinical trials to date people who have not responded to standard antidepressant treatment — such as SSRIs including Prozac — seem to respond to ketamine. And while it can take weeks to feel better after starting a prescription antidepressant, the therapeutic effects of ketamine are seen in a matter of hours.

Despite the seemingly “miracle drug” nature of ketamine, there are serious concerns about its use in depression. First, it is unclear how the drug works to alleviate depression. Second, there are no long-term studies on its long-term use. Studies that have already been done indicate the antidepressant effects of ketamine can last from between a few days to a few weeks.

And due to the addictive nature of ketamine itself, there are worries that sustained use of it may lead to dependence.

On May 4, Nature published the results of the latest trial involving ketamine, bolstering its potential as an antidepressant treatment. Researchers, examining the drug in mice, found that that the mood boosting effects may not be caused by ketamine itself, but instead by one of the metabolites ((2R,6R)-hydroxynorketamine) formed when the drug is broken down into smaller pieces.

Even more promising, the ketamine given to the rats did not increase side effects, even though the dose was much stronger than what would be given to humans for depression. The researchers say they want to take the metabolite into testing in humans, though that is likely years away.

The largest trial ever of ketamine in depression was done in 2013 with 73 participants. The drug lead to a decline in depression symptoms 24 hours after treatment in 64% of patients, all of whom had tried at least 3 other drugs without any results.  Antidepressant Efficacy of Ketamine in Treatment resistant depression

Despite the lack of clear-cut evidence of its benefits and unknowns about its long-term risk, many doctors are already offering ketamine as a depression treatments to patients, though this is an off-label use.

Side effects of ketamine can include confusion, lucid daydreaming, fuzzy vision, and a “high” feeling, though they tend to go away quickly, according to these doctors. Patients, who are usually given ketamine via infusion, are carefully monitored and must have pre-arranged transport home. They can’t drive or use heavy machinery for 24 hours.

Drug companies are even trying to cash in on the ketamine craze. Janssen Pharmaceutical is testing a form of ketamine it developed, called esketamine, in 5 clinical trials. It would be given via a nasal spray. Another is rapastinel, under development by Allergan. Both drugs had “breakthrough therapy designation” from the FDA, meaning they will go through the regulatory process at a much quicker rate.

NMDAR inhibition-independent antidepressant actions of ketamine metabolites

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K for OCD

The pros and cons of ketamine

By Tracie White
Illustration by Kotryna Zukauskaite

Geuris “Jerry” Rivas, a native of New York, was diagnosed with severe obsessive-compulsive disorder when he was 15. Obsessions with organizing and reorganizing the belongings in his bedroom — posters, comic books, videos — took over most of his life.

Extra

volumehigh audio interview  < interview Link

Forced by germ obsessions to compulsively wash and rewash his hands, he started wearing gloves all day to both protect him from the germs and stop him from washing his hands raw. Now, at 36, OCD symptoms continue to cost him jobs and relationships. He’s managed to turn his organizational skills into a profession — he’s a home organizer and house cleaner — but still he struggles daily with his obsessions.

“It’s caused me a great deal of suffering,” Rivas says. “I’ve tried many, many medications. I’ve wasted so much of my life.”

In 2012, running out of answers, Rivas took part in the first clinical trial to test ketamine as a treatment for OCD. While ketamine is approved by the U.S. Food and Drug Administration as an anesthetic, it is also an illicit party drug known as “Special K,” with hallucinogenic effects and the potential for abuse. Over the past 10 years, dozens of small studies of ketamine’s ability to treat a variety of mood and anxiety disorders have reported remarkable results — including the sudden alleviation of treatment-resistant depression, bipolar disorder and post-traumatic stress disorder. And these effects lasted days, sometimes weeks, after the hallucinogenic effects of the drug wore off.

With a single infusion of the drug, Rivas experienced for two weeks what it was like to live without the compulsions and obsessions that had for years controlled his life.

“I felt like, for the first time, I was able to function like a regular person,” he says.

Illustration of a giant K being painted by a man in a white coat
Kotryna Zukauskaite

Pros and cons

Ketamine has brought hope to a psychiatric field desperate to find new treatments for severe OCD, a chronic condition marked by debilitating obsessions and repetitive behaviors. Current treatments, which include antidepressants such as Prozac, can take months to have any effect on the disease, if they work at all.

“Severe OCD takes such a toll on patients,” says Carolyn Rodriguez, MD, PhD, who as a researcher at Columbia University ran the OCD trial. Now an assistant professor of psychiatry and behavioral sciences at Stanford, she has continued to explore the pros and cons of using ketamine to treat OCD. “The constant, intrusive thoughts that something is contaminated, the checking and rechecking, the repetitive behaviors. It interferes with your life, your jobs, your relationships.”

Ketamine was developed in the 1960s and has been used for decades as an anesthetic during surgery. It remains a mystery just how the drug works in the brain, and there are safety concerns. There is evidence from people who take the drug routinely — in much higher doses — that chronic, high-frequency ketamine use may be associated with increased risk of bladder inflammation and cognitive impairment, Rodriguez says. And if taken regularly, it can lead to dependence.

But researchers like Rodriguez are intrigued about the drug’s potential to help them identify a whole new line of medicines for fast-acting treatment of mental health disorders.

“What most excites me about ketamine is that it works in a different way than traditional antidepressants,” Rodriguez says. “Using ketamine, we hope to understand the neurobiology that could lead to safe, fast-acting treatments. I feel that is part of my mission as a physician and researcher.”

‘Right out of a movie’

Rodriguez’s interest in ketamine as a treatment for OCD was sparked about a decade ago when she was starting out as a research scientist at Columbia. A small, placebo-controlled study published in 2006 by a mentor of hers, Carlos Zarate, MD, now chief of the section on neurobiology and treatment of mood disorders at the National Institute of Mental Health, had shown that ketamine induced dramatic improvement in treatment-resistant depression within two hours of infusion. It was a landmark study, drawing attention among the psychiatric community and launching a new field of research into the use of ketamine to treat various mood and anxiety disorders.”What most excites me about ketamine is that it works in a different way than traditional antidepressants.”

Rodriguez, intent on searching for better, faster treatments for her patients like Rivas with OCD, took note. There was an emerging theory that ketamine affects the levels of the neurotransmitter glutamate in the brain and increasing evidence that glutamate plays a role in OCD symptoms, she says. Perhaps ketamine could help regulate OCD symptoms as well as depression.

In 2013, Rodriguez and colleagues published their results from that first clinical trial of ketamine in OCD patients. The trial randomized 15 patients with OCD to ketamine or placebo.

In those patients who were given ketamine, the effect was immediate. Patients reported dramatic decreases in their obsessive-compulsive symptoms midway through the 40-minute infusion, according to the study. The diminished symptoms lasted throughout the following week in half of the patients. Most striking were comments by the patients quoted in the study: “I tried to have OCD thoughts, but I couldn’t,” said one. Another said, “I feel as if the weight of OCD has been lifted.” A third said, “I don’t have any intrusive thoughts. … This is amazing, unbelievable. This is right out of a movie.” And while nearly all initially had dissociative effects like feelings of unreality, distortions of time or hallucinations, they were gone within two hours after the start of the infusion.

“Carolyn’s study was quite exciting,” Zarate says, adding that there were a number of similar, small but rigorous studies following his 2006 study that found fast-acting results using ketamine to treat bipolar disorder and post-traumatic stress disorder.

“We had no reason to believe that ketamine could wipe out any symptoms of these disorders within hours or days,” he says.

So how does it work?

Virtually all of the antidepressants used in the past 60 years work the same way: by raising levels of serotonin or one or two other neurotransmitters. Ketamine, however, doesn’t affect serotonin levels. Exactly what it does remains unclear.”There’s a recognition that people like me and others are using the drug to treat patients now. There’s an incredible need for something.”

Since coming to Stanford in 2015, Rodriguez has been funded by the National Institute of Mental Health for a large clinical trial of ketamine’s effects on OCD. This five-year trial aims to follow 90 OCD patients for as long as six months after they’ve been given a dose of ketamine or an alternative drug. Rodriguez and her research team want to observe how ketamine changes participants’ brains, as well as test for side effects.

Ultimately, Rodriguez says, she hopes the study will lead to the discovery of other fast-acting drugs that work in the brain like ketamine but without its addictive potential.

Recent research in the field indicates that the glutamate hypothesis that triggered her pilot study might be further refined.

“Ketamine is a complicated drug that works on many different receptor sites,” she says. “Researchers have fixated on the NMDA receptor, one of the glutamate-type receptors, but it might not be the only receptor bringing benefit.”

In May 2016, researchers from NIMH and the University of Maryland — Zarate among them — published a study conducted in mice showing that a chemical byproduct, or metabolite, created as the body breaks down ketamine might hold the secret to its rapid antidepressant actions. This metabolite, hydroxynorketamine, reversed depressionlike symptoms in mice without triggering any of the anesthetic, dissociative or addictive side effects associated with ketamine, Zarate says.

“Ideally, we’d like to test hydroxynorketamine and possibly other drugs that act on glutamate pathways without ketamine-like side effects as possible alternatives to ketamine in OCD,” Rodriguez says.

Beyond the clubs

Meanwhile, dozens of commercial ketamine clinics have popped up across the country, making treatments available to patients who are searching for help to stop their suffering now. Medical insurance companies usually cover ketamine’s FDA-approved use as an anesthetic but won’t cover its use for other purposes, such as mental health disorders. So patients who have run out of treatment options are paying hundreds of dollars a dose for repeated ketamine infusions.

“The fact that these clinics exist is due to the desperation of patients,” says Rodriguez.

She and other researchers are calling for guidelines to protect patients and more research to learn how to use the drug safely.

“I think it’s a game changer, and it’s here to stay,” says David Feifel, MD, PhD, professor emeritus of psychiatry at UC-San Diego, who studies the effect of ketamine on clinical depression. Feifel began prescribing the drug for patients with treatment-resistant depression in 2010.

“I’ve found it to be very safe,” Feifel says, adding that the American Psychiatric Association this year issued safety guidelines on how to use ketamine clinically for treatment of depression.

“There’s a recognition that people like me and others are using the drug to treat patients now,” he says. “There’s an incredible need for something.”

The drug hasn’t worked for everyone he’s treated, Feifel says, but for many it’s been “life-changing.”

Rodriguez says she understands what motivates the clinicians to prescribe the drug now to patients in dire straits — those who are suicidal or who have tried every possible medication and therapeutic option and continue to suffer each day.

“I see it as a way to treat people whose OCD is very, very severe,” she says. “People who can’t come out of the house, who are suicidal, who have no other options.

“I just don’t like the idea of people being in pain,” Rodriguez adds. “I want to see science translated into treatments now.”

Meanwhile, researchers are learning more about the drug. Janssen Pharmaceutical is testing the efficacy of a version of ketamine, known as esketamine, as a therapy for treatment-resistant depression and for major depressive disorder with imminent risk for suicide. The FDA has fast-tracked both investigations. At Stanford, Alan Schatzberg, MD, a professor of psychiatry and behavioral sciences, along with other faculty including Rodriguez, is studying the mechanism of action for ketamine in treating depression.

Rodriguez is also interested in using ketamine to kick-start a type of cognitive behavioral therapy called exposure and response prevention, an evidence-based psychological treatment designed to help patients overcome OCD. The therapy involves teaching patients with OCD to face anxieties by refraining from ritualizing behaviors, then progressing to more challenging anxieties as they experience success.

Relaxation and other techniques also help patients tolerate their anxiety — for example, postponing the compulsion to wash their hands for at least 30 minutes, then extending that time period.

“My goal isn’t to have people taking ketamine for long periods of time,” Rodriguez says. But perhaps a short-term course of ketamine could provide its own kind of exposure and response prevention by allowing patients to experience that it is possible not to be controlled by their OCD, she says.

Rivas well remembers that infusion of ketamine he received during Rodriguez’s first clinical trial to test the drug. The rush made him feel “like Superman.”

“I felt like my body was bigger, that I was more muscular, that I could tackle anything,” he says. But that feeling only lasted the duration of the 40-minute infusion. His OCD symptoms disappeared immediately and were still gone for two weeks after.

“I was amazed that something like that would work and work so fast,” he says. His OCD symptoms today are still intrusive, but he manages to keep them under control by taking antidepressants and seeing a therapist. Still, each day when he comes home from work, he has to put gloves on before he enters his apartment building, and as soon as he enters his apartment, he must wash his hands.

“It’s a ritual now,” he says. “There has never been a time that I haven’t done that, except those two weeks after the ketamine.”

When he heard that certain private ketamine clinics are now offering the drug as treatment for OCD, he said he understands why patients take the risks and pay the high prices. As more research has become available, he’s begun considering it himself.

“I’ve been suffering through my OCD for so long, I’ve gotten to the point where I’d try anything,” he says.

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Learn How Ketamine Can Treat Post Traumatic Stress Disorder ICD 10

NOVA Heath Recovery Ketamine Treatment Center | Call 703–844-0184 for a Ketamine Treatment | Alexandria, Va 22306 | 7 days a week and evening appointments as well! We also evaluate depression, ADHD, PTSD. Intranasal Ketamine available.   The email is EMAIL@novahealthrecovery.com

Learn How Ketamine Can Treat Post Traumatic Stress Disorder

For decades, ketamine has been used as a medicinal intervention for treating depression, anxiety, mood disorders, and post-traumatic stress disorder (PTSD). While most ketamine advocates recognize its therapeutic potential for treating depression, the many benefits available to those suffering from PTSD are less understood.

Do you or a loved one suffer from post-traumatic stress disorder? If so, ketamine infusion therapy may be able to help alleviate your symptoms and provide the relief you need. However, public knowledge about medicinal ketamine is lacking. In this article, we go over everything there is to know about ketamine for treating PTSD.

PTSD 101: What You Need to Know

Post-traumatic stress disorder has a medical diagnostic code of ICD-10, which is the code used for reimbursing treatment through your insurance provider. PTSD, unlike other mental illnesses, is characterized by its triggering from a single or series of traumatic events. This explains why PTSD is common among military veterans and first responders.

According to a summary article from Mayo Clinic, PTSD is a mental health condition triggered by a terrifying experience. The sufferer subsequently experiences flashbacks, night terrors, and anxiety attacks that they cannot control as a result of the event. It takes a significant amount of time, therapy, and self-care to overcome the trauma of PTSD.

There is no known cure for PTSD. However, many experimental medicinal interventions are breaking ground when it comes to finding a cure. For example, the psychoactive drugs MDMA and ketamine have both been studied for their potential to alleviate the negative effects of PTSD.

Ketamine Infusion Therapy

Since the early 2000s, ketamine has gained popularity among medical providers for its application in infusion therapies. In recent years, clinics all around the world have embraced the healing power of ketamine by offering ketamine infusion therapy. This unique therapy involves one or more intravenous injections of ketamine under the supervision of an anesthesiologist.

What Is Ketamine?

Although ketamine has garnered a reputation as a party drug, its primary value is in its ability to provide fast-acting and potent relief for those with chronic pain issues. Ketamine was first synthesized in the 1960s and was later adopted as an anesthetic in veterinary medicine by the end of the decade. However, use in humans was initially sparse.

Ketamine is both an analgesic and anesthetic drug, which means its primary quality is to reduce or prevent pain. This makes ketamine highly effective for treating major depressive disorder, chronic back pain, and PTSD.

Ketamine and PTSD

Ketamine-infusion-clinics-across-mi

Ketamine infusion clinics across the United States are now offering specialty treatments for those suffering from PTSD. For example, the renowned Ketamine Clinics of Los Angeles has treated hundreds of PTSD patients over the years. Led by Dr. Steven Mandel, M.D., the team at Ketamine Clinics of LA has a proven track record of helping relieve the pain of PTSD.

An increasing amount of scientific research has proven that ketamine is effective in treating PTSD. Most notably, a breakthrough 2014 study in JAMA Psychiatry discovered that a single intravenous subanesthetic dose of ketamine resulted in “significant and rapid reduction in PTSD symptom severity.”

Over the past few years, many articles and news reports have heralded ketamine as a potential wonder drug for treating PTSD. A recent article published by Medscape discussed how a team of researchers at the Icahn School of Medicine at Mount Sinai in New York City used ketamine to fight depressive symptoms in patients with PTSD and severe depression.

Is Ketamine Safe for PTSD?

There is no doubt that ketamine is a novel treatment for many PTSD sufferers. Since it is a relatively new medicinal intervention, there is some skepticism within the medical community regarding whether it is safe for human use. However, many of these doubts have been quelled over the years thanks to numerous studies and experiences that have proven its safety.

The most compelling evidence suggesting that ketamine infusion is safe in humans comes from a 2014 clinical study. This study managed to safely administer low doses of ketamine to treat neuropathic pain states in adults. Over the two-week monitoring period, the patients exhibited numerous benefits while experiencing only marginal or negligible side effects.

It should be noted that ketamine is not safe if taken recreationally. Since its inception, ketamine has gained a reputation as a party drug for its ability to induce dissociative states and euphoria. However, ketamine is not safe to use unless administered by a licensed physician. It is possible to overdose on ketamine, and the side effects of using high doses of ketamine can be fatal.

Ketamine: A PTSD Prevention Tool?

Interestingly, ketamine has found success as a tool for preventing the onset of PTSD. In one case, a research team gave a family of mice a low dose of ketamine before exposing them to electric shocks. Usually, mice exhibit symptoms of PTSD after being exposed to such a severe stressor. However, the mice that were given ketamine did not exhibit these symptoms at all.

Typically, traumatized mice freeze up when they are placed back in the cage in which they were shocked. In this case, the mice who were sedated with ketamine did not freeze when placed in the cage or froze for a significantly reduced duration. This led the research team to believe that ketamine may have value in both preventing and treating PTSD in humans.

Is Ketamine Right for You?

Ketamine may be an appropriate treatment option for you if you have treatment-resistant PTSD. In other words, you must first be diagnosed with PTSD and have sought the traditional frontline treatments for the condition before considering ketamine infusion therapy. We recommend speaking with your doctor about your PTSD symptoms and the appropriate therapies available to you. Usually, SSRIs or benzodiazepine pharmaceutical drugs, in conjunction with cognitive behavioral therapy (CBT) is the first method of treatment. However, if you do not respond well to this treatment option you should consider seeking ketamine therapy.

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Ketamine for Depression: Does it work?

What is Ketamine?

Ketamine, also known as Ketalar, Ketaset, and Ketanest, is a medication that’s currently FDA approved only as an anesthetic but it’s showing great potential as a treatment for severe depression. In fact, numerous Ketamine Clinics have begun to appear throughout the United States to solve this problem. Depressed patients with stubborn symptoms get relief within hours rather than weeks with conventional anti-depressants. Doctors can only prescribe ketamine for depression off-label because studies are relatively new, but experts are saying that ketamine is one of the biggest breakthroughs in severe depression treatment to come along in decades [1].

Ketamine is a powerful pain reliever and a relaxant, but at higher doses it can also induce unconsciousness and disturbances in how a person experiences sight and sound. In high doses, it can produce hallucinations and delusions and its ability to create strong dissociative experiences have made it popular in the club scene where it’s known as “Special K”. An overdose of ketamine can be fatal and it can be addictive if patients don’t follow their doctor’s prescription guidelines. Currently, ketamine is scheduled as a class III drug and it’s created a lot of controversy among experts who disagree about whether it’s safe for doctors to prescribe it as a treatment for chronic depression. Despite the intrigue and the need for additional research to establish its safety and efficacy, ketamine clinics are now offering infusion treatments to patients all over the United States [1][2][8][9].

Effects of Ketamine

As a street drug, ketamine creates a sense of dissociation and can change a person’s sense of hearing and sight, but for patients with severe depression, ketamine relieves mood problems within hours or sometimes moments for about 85% of those treated. While conventional anti-depressants can take several weeks to take effect, studies have shown that ketamine often improves depression symptoms almost immediately. Patients typically feel better within hours [1][2].

Doctors, dentists, and psychiatrists prescribe ketamine to help their patients achieve a variety of different health goals. Doctors often use ketamine in FDA approved situations such as procedures involving cardiac catheterization, orthopedics, skin grafting, or diagnostics involving the eye, ear, nose, and throat. Surgical dentists may also use ketamine as an anesthesia during tooth extractions. After other treatment options have been attempted and failed, doctors may use ketamine to treat certain types of seizures in patients with status epilepticus [2].

Researchers demonstrated in 2014 that ketamine reduced symptoms of post-traumatic stress disorder in 41 patients and there are other exciting possibilities on the horizon in terms of PTSD treatment. Treatment-resistant depression and substance use disorders could both be treated with this drug, though many medical professionals view ketamine treatment for these mental health issues as controversial [2].

Ketamine for Pain Management (CRPS)

Central Sensitization is a process the central nervous system goes through which causes Complex Regional Pain Syndrome (CRPS/RSD) and other types of chronic pain. In central sensitization the number of NMDA receptors increases which amplifies a patients’ experience of pain. Ketamine interferes with NMDA receptors which puts a damper on pain signaling, providing pain relief and a desensitization to pain for patients affected by CRPS [8].

At low doses, ketamine can relieve chronic pain and potentiate the effects of sedatives. Researchers believe that ketamine could provide an alternative to more addictive painkillers like morphine if the FDA approves it for this use [1][8].

Ketamine for Anesthesia

In the 1960’s doctors used ketamine as an anesthetic on the battlefields in Vietnam because administration lends itself well to use in disaster zones; doctors don’t need electricity, an oxygen supply, or even highly trained staff to give patients ketamine. Since that time, the FDA has only approved ketamine for use as an anesthetic in hospitals and medical settings. As an anesthetic, ketamine doesn’t lower the patient’s breathing rate or blood pressure, which makes it safer than other anesthesia options. It’s for this reason that veterinarians use ketamine more than any other type of anesthetic for surgery on animals [1][2].

Ketamine for Depression

Depression is a major issue in the United States and though there are many anti-depressants on the market, about one-third of patients don’t experience any relief from their symptoms using the drugs that are currently available. Ketamine acts on depression by rebalancing a different set of neurotransmitters and receptors (the NMDA/glutamate receptors and GABA receptors) than the old-school Selective Serotonin Reuptake Inhibitors (which function by blocking reabsorption of serotonin). By blocking glutamate receptors in the brain, the majority of patients with ‘Treatment Resistant Depression’ are able to experience relief from their symptoms using ketamine [1].

Even though ketamine has yet to be approved by the FDA for use in treating depression, patients are flocking to ketamine clinics to receive the treatment off-label. It provides fast relief, which is vitally important in cases where patients feel suicidal and for depressed patients who have tried all of the other anti-depressants available with no luck, ketamine offers new hope. Infusion treatments take about 1 hour at a clinic, but the results are long-lasting with most patients returning only once every one to two weeks over a specified period of time. The treatment is expensive, but the results are promising enough that patients are willing to pay out-of-pocket for it [5][8][9].

The FDA hasn’t yet approved ketamine for use as an anti-depressant, but both Esketamine and Rapastinel (developed by Johnson & Johnson and Allergan respectively) have been fast-tracked as breakthrough drugs. The demand for these two medications is projected to grow rapidly in the coming years.  Still, doctors can only prescribe ketamine for depression off-label since ketamine has been FDA approved for use as an anesthetic, not as an anti-depressant. Researchers have cautioned doctors to avoid over-prescribing this drug because the long-term health and well-being of patients could be at risk. Ketamine has a high potential for abuse, after all and experts claim that the evidence does not exist to prove that this drug is safe [1][2][6].

Ketamine as Drugs of Abuse

Ketamine is abused as a recreational drug and it has effects that are similar to Phenylcyclidine (PCP), LSD, dextromethorphan (DXM) and nitrous oxide (laughing gas). Ketamine is a dissociative anesthetic that can alter one’s sense of sight and sound and also produce profound relaxation, hallucinations, and delusions for about an hour. The effects of the drug come on almost immediately. It has been used as a rape drug that can render women unable to speak or to move [1][2].

People who abuse ketamine have developed serious bladder and kidney problems such as ulcerative cystitis, stomach issues, and memory loss. In fact, street users even risk developing depression as a result of addiction and dependence on the drug [2].

How is Ketamine used for depression?

Doctors may prescribe ketamine by itself or in tandem with other anti-depressants [3]. Many experts on depression recommend that ketamine only be used as a short-term depression treatment option while other anti-depressants are taking effect. Though there are convenient ketamine nasal sprays in research and development by Johnson & Johnson, the high-potential for abuse of this drug has made many doctors and psychiatrists wary of using this drug to treat depression long-term. Further, some medical organizations are concerned that the long-term effects of chronic ketamine use is not well-understood. According to these organizations, more research is needed to establish the safety of this drug [1][2][6].

Promising Remedy for ‘Treatment Resistant Depressions’

Thomas Insel, the director of the National Institute of Mental Health says, “Recent data suggest that ketamine, given intravenously might be the most important breakthrough anti-depressant in decades.” Conventional anti-depressants aren’t able to help about one-third of patients with major depression, but new ketamine drugs such as esketamine (in development by Johnson and Johnson) may offer new hope. Infusion therapies available through ketamine clinics across the United States report a high success rate of 60% to 70% treating Treatment Resistant Depression as well as Major Depression with risk of suicide [1][3][5][6].

Fast-Tracked by FDA

Two drugs, Johnson & Johnson’s Esketamine and Allergan’s Rapastinel, were both upgraded to ‘fast-track’ status by the FDA in 2016 due to their importance and promise in treating treatment resistant depression.

Depression is the leading cause of disability in the world and currently, 12% of Americans (about 29 million people) are taking anti-depressant medications. The suicide rate is higher now than it has been in over 30 years. And about one-third of depressed Americans don’t experience relief taking conventional anti-depressants. In the interest of capitalizing on the market value of depression, which is projected to almost double by the year 2024, the FDA will review the use of these new ketamine-based depression drugs in 2018 and 2019, allowing Johnson & Johnson and Allergan to go through an abbreviated version of the normally lengthy FDA approval process for new drug therapies [5][6].

Experimental Trials

Drug trials have shown that 60% to 70% of patients with Treatment-Resistant Depression have been responsive to ketamine. Esketamine, a nasal spray developed by Johnson & Johnson, is in Phase III clinical trials right now. They are expected to receive FDA approval later in 2018, and once that happens, it will open doors for administering ketamine outside a clinic setting.

Rapastinel, which was developed by Allergan, is out of Phase III and awaiting FDA approval. The drug can be administered within 30 seconds intravenously and Allergan is working to develop an oral version of the drug as well [2][3][5].

How Ketamine Therapy Works

Ketamine therapy is usually performed at a ketamine clinic. Patients receive an intravenous infusion of the drug with relief from depression symptoms that can last for several weeks.

Ketamine Infusion or Intravenous Therapy (Infusion Process)

Ketamine can be injected directly into muscle tissue or it can be given intravenously. Researchers for Johnson & Johnson have also recently developed new treatment protocol called Esketamine that’s awaiting FDA approval. Using Esketamine, patients will be able to self-administer the drug as a nasal mist [2][3].

Patients must receive a referral from a doctor to go to a ketamine clinic. There, patients can receive an intravenous infusion of ketamine. On the first visit, a doctor will assess the patient before hooking the patient up to a ketamine IV. Patients then experience a variety of sensations during the infusion and for up to 2 hours following the infusion. Many patients report feeling a sense of deep relaxation and the ability to reflect on past traumas and anxieties calmly [7][9].

How does it work?

Researchers have demonstrated that a deficiency in certain vital connections between certain neurons in the brain may cause depression. Ketamine works as an NMDA receptor antagonist (NMDA is a glutamate receptor also known as N-methyl-d-aspartate) and an AMPA receptor stimulator. As such, ketamine stimulates the development of new receptors and synapses in the brain which helps patients regulate their mood, sleep better, and experience better focus [2][8].

Ketamine works by interfering with and rebalancing the glutamatergic system (glutamate and GABA) to stimulate new synaptic connections, better memory, and brain plasticity [8]. During ketamine infusions, patients may feel capable of exploring traumatic memories more calmly to reframe the past or they may feel a pleasant sensation of relaxation or floating [7]. Effects from an infusion can last for up to a week or two.

Intranasal ketamine formulas work by binding to a receptor called N-methyl-d-aspartate. In the brain, ketamine blocks the neurotransmitter glutamate which causes communication between the conscious mind and other parts of the mind (such as mood centers) to be blocked. In low doses, it relieves depression, but in higher doses, it can cause patients to feel an uncomfortable sense of dissociation from the body similar to a near death experience [2][3][4].

While most anti-depressant medications must build up in the body over the course of several weeks in order to have an effect, ketamine’s mood-altering benefits happen as the drug leaves the body. Researchers don’t know why this is the case, or even exactly how the drug achieves its strong anti-depressant effects but the fact is, ketamine works quickly to relieve depression symptoms in 85% of patients who are resistant to other forms of therapy [1]. Standard anti-depressants target the neurotransmitters serotonin, norepinephrine, and dopamine, but ketamine is different. Ketamine blocks glutamate and stimulates synaptic plasticity or the ability of the brain to change and grow [5].

Doctors don’t fully understand how ketamine works or the potential effects that patients may experience from taking tiny doses of this drug over and over again. What is known is that recreational users can suffer ulcerative cystitis or cognitive issues as a result of prolonged use [5].

Ketamine Infusion Dose/Dosage

Researchers are working to find the perfect ketamine dose for depression patients. The risk of overdosing on this drug is high for the recreational user because there is only a slight difference between a dosage that leads to desirable effects and one that can cause a lethal overdose. The goal for researchers is to find an exact dosage that’s high enough to get rid of symptoms of depression but low enough to prevent patients from experiencing hearing and sight disturbances as well as the other negative effects from the drug [1][2][9]. Ketamine produces only temporary effects on severe depression. Patients must continue to return to the clinic for infusions every few weeks to keep their depression symptoms in check [5].

Ketamine therapy cost? Is ketamine therapy covered by insurance?

Ketamine therapy is rarely covered by insurance and it’s pricey. Patients typically pay between $400 and $800 per infusion in many centers.

Ketamine Infusion Side-Effects

Ketamine use can cause a variety of side effects including:

  • Extreme fatigue or exhaustion
  • Nervousness or restlessness
  • Sweating
  • Amnesia
  • Puffy or swollen eyelids, lips, or tongue
  • Hives, itching, or rash
  • Delusions
  • Difficulty thinking or learning
  • Loss of appetite
  • Nausea
  • Fast heartbeat, slow heartbeat, irregular heartbeat
  • Dizziness, fainting
  • Difficulty swallowing
  • Confusion
  • Convulsions
  • Difficulty breathing
  • Chest pain or discomfort
  • Blurry vision
  • Inability to control eye movement
  • Slurred speech
  • Difficulty urinating, frequent urination, cloudy or bloody urine
  • Paleness, bluish lips, skin, or fingernails
  • Increased pressure in the brain and the eyes [1][2]

Where can you get ketamine therapy? | NOVA Health Recovery Ketamine Treatment Center | Alexandria, Va 22306 | 703-844-0184

Off-label ketamine infusion therapy is an unregulated business that has gotten the attention of both clinicians and medical organizations. There are currently ketamine clinics in a number of cities throughout the United States [10].

s ketamine therapy addictive?

Patients who use ketamine long-term may develop a tolerance and addiction to the drug over time. In medical settings, ketamine is safe to use because the dosage is carefully calibrated and monitored, but there is a high potential for abuse when patients use ketamine recreationally as  a street drug. If patients don’t follow their doctor’s prescription for ketamine it can have extremely negative mental and physical effects particularly on the brain and bladder [2].

Ketamine-Based Drugs in Late Stage Trials

Both Rapastinel and Esketamine are ketamine-based drugs that have been ‘fast-tracked’ by the FDA because the FDA has identified them as “breakthrough drugs” [5].

Rapastinel

Allergan developed Rapastinel, a ketamine drug that can be administered in 30 seconds intravenously. It works on the same receptors as ketamine, but it doesn’t produce hallucinations. An oral version of Rapastinel is also in development. The FDA considers Rapastinel to be a “breakthrough drug” which means that Allergan can speed through the lengthy drug approval process and get the drug to market by 2019 [5].

Esketamine

The FDA has designated Esketamine a “breakthrough therapy”, which means that the drug developers, a subsidiary of Johnson & Johnson, can speed through the lengthy drug approval process to get the drug on the market more quickly. Esketamine can be administered like a nasal decongestant, which would make it more convenient than intravenous therapy for depression patients. Experts feel that Esketemine would be most appropriately used as an adjunct therapy in combination with other anti-depressant medications, not as a standalone treatment for depression [5][6].

According to one recent study, when administered in combination with other oral antidepressants, Esketamine reduced patients’ depression symptoms more than oral anti-depressants alone. The anti-depressant effects of using a conventional anti-depressant in conjunction with Esketamine occurred within only about 1 week. When used alone, Esketamine effects seem to last 1 to 7 days in most patients. Esketamine is in Phase 3 testing with the FDA for use as a drug for ‘Treatment Resistant Depression’ and Major Depression with risk of suicide. Johnson & Johnson will file for FDA approval for this drug as a depression treatment in 2018 [3][6].

Risks of Ketamine Abuse

Ketamine abuse is a serious problem. It is possible to become addicted to ketamine. Patients may begin to need higher doses of the drug in order to experience the positive effects. An overdose of ketamine can be deadly. The effects of using ketamine chronically over a long period of time have not been established, but recreational drug users who have used ketamine long-term have developed ulcerative cystitis as well as cognitive issues [1][2].

The Ketamine Controversy

While ketamine can literally save lives by relieving the symptoms of major, Treatment Resistant Depression, including the risk of suicide, research still has not established the safety of ketamine for long-term use. The lethal dose of ketamine is only slightly higher than the therapeutic dose and its addictive properties mean that it could cause depressed patients more problems than it solves. Ketamine clinics have popped up all over the country to cash in on the high demand for a depression treatment that really works, but the research hasn’t demonstrated that this drug is safe for chronic use. So this is an instance where the buyer needs to beware. The FDA has fast-tracked these drugs because it’s constituents see market potential, but important research still needs to be done on this drug to demonstrate it’s safety and long-term efficacy.

Resources:

[1] Collins, S. (2005-2018). What you need to know about ketamine’s effects. Retrieved April 3, 2018 from https://www.webmd.com/depression/features/what-does-ketamine-do-your-brain#1

[2] Davis, K. (2017). What are the uses of ketamine? Retrieved April 3, 2018 from https://www.medicalnewstoday.com/articles/302663.php

[3] Pagliarulo, N. (2018). J& J builds case for ketamine-based depression drug. Retrieved April 3, 2018 from https://www.biopharmadive.com/news/jj-builds-case-for-ketamine-based-depression-drug/513866/

[4] No Author (2007-2018). Special K and X. Retrieved April 3, 2018 from http://goaskalice.columbia.edu/answered-questions/special-k-and-x

[5] Oaklander, M. (2017). New Hope for Depression. Retrieved April 3, 2018 from http://time.com/4876098/new-hope-for-depression/

[6] Oberhaus, D. (2017). Ketamine Nasal Spray Will Totally Change the Market for Antidepressant Drugs. Retrieved April 3, 2018 from https://tonic.vice.com/en_us/article/wjxd9b/ketamine-nasal-spray-will-totally-change-the-market-for-antidepressant-drugs

[7] Ketamine Advocacy Network (2015). The Infusion Experience. Retrieved April 3, 2018 from http://www.ketamineadvocacynetwork.org/the-infusion-experience/

[8] Ketamine Clinics of Los Angeles (2018). How does ketamine infusion therapy work? Retrieved April 3, 2018 from https://www.ketamineclinics.com/about-ketamine/how-it-works/

[10] Ault, A. (2017). US Ketamine Clinics Continue to Mushroom With No Regulation. Retrieved April 3, 2018 from https://www.medscape.com/viewarticle/886750