TIME: Ketamine for Depression: The Most Important Advance in Field in 50 Years?

Maia Szalavitz at TIME writes of ketamine infusion therapy for depression:

A single dose of ketamine produces relief of depression that has been shown in studies to last for up to 10 days; it also appears to reduce symptoms of bipolar disorder and suicidal thoughts. Now, a new research review published in Science calls the discovery of these effects of ketamine, “arguably the most important discovery in half a century” of depression research.