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Potential for abuse and strategies for containing any risks from an experimental depression treatment from Johnson & Johnson will be in focus at an Food and Drug Administration panel next week.
J&J’s nasal spray, esketamine, a close cousin of the party drug ketamine, will be considered by an FDA advisory panel on Feb. 12. While agency staff seemed satisfied that the likelihood of abuse is low, they raised questions about safety issues connected to a dreamlike sensation the medication can create in some users.
“Ketamine abuse is relatively uncommon in the general population,” agency staff said in a report ahead of next week’s meeting. Just 1.3 percent of people over age 12 abuse the drug, lower than abuse rates for other hallucinogens like ecstasy and LSD.
At the same time, reviewers worried that patients could get into accidents or otherwise be harmed if they leave a doctor’s office while still experiencing disassociation, a known side effect of ketamine — and a sought-after experience for casual users who have dubbed the spacey feeling the “K-hole.”
It takes roughly 90 minutes for disassociation symptoms from esketamine to resolve, according to the report. FDA staff also cited elevated blood pressure as a safety concern.
Esketamine is a key part of J&J’s pharmaceutical pipeline, as the company faces flagging sales this year weighed down by drug pricing scrutiny and looming generic competition. Its shares, which rose 2.3 percent this year through Thursday’s close, were were little changed in early trading on Friday.
In addition to weighing in on the drug’s safety and a proposed risk-evaluation and mitigation strategy, FDA staff will ask advisers to vote on whether esketamine effectively treated the depression of patients who weren’t helped by other therapies. They’ll also discuss whether additional studies are needed before or after the drug is potentially approved.
The staff report noted there were six deaths among patients taking the J&J drug, of which three were suicide in the esketamine depression program, but they didn’t see a clear link to the drug itself.
“Given the small number of cases, the severity of the patients’ underlying illness, and the lack of a consistent pattern among these cases, it is difficult to consider these deaths as drug related,” staff reviewers noted.
A decision on whether to allow the drug on the market is expected by March 4. Esketamine has the FDA’s breakthrough-therapy designation in treatment-resistant depression as well as for depressed people at risk of suicide. Results from a study in suicidal patients are expected this year. Allergan is also testing a fast-acting antidepressant, rapastinel, which is about a year behind esketamine in testing.