Repeated intravenous infusions of ketamine provide rapid relief for patients with posttraumatic stress disorder, new research suggests.

In what investigators are calling the first randomized controlled trial of repeated ketamine administration for chronic PTSD, 30 patients received six infusions of ketamine or midazolam (used as a psychoactive placebo) over 2 consecutive weeks.

Between baseline and week 2, those receiving ketamine showed significantly…

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