No three strung-together letters in the English language are more loaded than L-S-D. Say them out loud to elicit images of strung out hippies waving their hands around and making things out of flowers, or of an innocent youth’s mind snapping under the weight of acid. Or just really bad art. Psychedelics have a brand problem, but early studies suggest drugs like LSD and MDMA could treat disorders like post-traumatic stress disorder. Operative word being