Many of us know only one side of the story of psychedelic therapy. In the 1950s and early 1960s, psychiatrists gave LSD and mescaline to patients struggling with depression, anxiety, and addiction.

LSD (lysergic acid diethylamide), also called “acid,” is a type of synthetic and mind-altering substance (psychedelic). This belongs to a class of drugs called hallucinogens. When you take LSD, even ...