Stephen Hinshaw, professor of psychology at the University of California at Berkeley, said marijuana is a “cognitive disorganizer” that produces roughly the same effect in users as those associated with ADHD. “The active ingredient in pot, THC, causes short-term memory problems and inattention,” Hinshaw said, “the very same things you want a medicine for ADHD to help alleviate.” However, Lester Grinspoon, emeritus professor of psychiatry at Harvard Medical School, states,
“I’d have no hesitation of giving a youngster with ADHD a trial of oral marijuana.”