“It’s a completely different mechanism. And the focus is on really rapidly helping someone get out of a depressive episode.”

This new mechanism isn’t the result of a recently discovered chemical compound but the reapplication of an existing drug – ketamine. Used in both human and veterinary science as an anaesthetic agent, it’s also taken recreationally among drug users who seek out its dissociative, euphoric and hallucinatory effects.

via Party drug treats depression.