The promise and peril of ketamine

Last year, the actor Matthew Perry, co-star of the hit sitcom “Friends,” was found dead in his Los Angeles home due in part to the effects of ketamine. Perry’s death has heightened concerns among experts about the growing use of ketamine to treat anxiety and depression.

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Contributor: Monica Campbell, Rennie Svirnovskiy, Ali Bianco, Emma Talkoff, Peter Bresnan