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Intranasal ketamine confers rapid antidepressant effect in depression
Date:4/8/2014

A research team from the Icahn School of Medicine at Mount Sinai published the first controlled evidence showing that an intranasal ketamine spray conferred an unusually rapid antidepressant effect within 24 hoursand was well tolerated in patients with treatment-resistant major depressive disorder. This is the first study to show benefits with an intranasal formulation of ketamine. Results from the study were published online in the peer-reviewed journal Biological Psychiatry on April 2, 2014.

Of 18 patients completing two treatment days with ketamine or saline, eight met response criteria to ketamine within 24 hours versus one on saline. Ketamine proved safe with minimal dissociative effects or changes in hemodynamic dimensions.

The study randomized 20 patients with major depressive disorder to ketamine (a single 50 mg dose) or saline in a double-blind, crossover study. Change in depression severity was measured using the Montgomery-Asberg Depression Rating Scale. Secondary outcomes included the durability of response, changes in self-reports of depression, anxiety, and the proportion of responders.

"One of the primary effects of ketamine in the brain is to block the NMDA [N-methyl-d-aspartate] glutamate receptor," said James W. Murrough, MD, principal investigator of the study, and Assistant Professor of Psychiatry and Neuroscience, and Associate Director of the Mood and Anxiety Disorders Program at the Icahn School of Medicine at Mount Sinai. "There is an urgent clinical need for new treatments for depression with novel mechanisms of action. With further research and development, this could lay the groundwork for using NMDA targeted treatments for major depressive disorder."

"We found intranasal ketamine to be well tolerated with few side effects," said Kyle Lapidus, MD, PhD, Assistant Professor of Psychiatry, at the Icahn School of Medicine at Mount Sinai.

One of the most common NMDA receptor antagonists
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Source:Eurekalert

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