Reefer Madness is the title of a 1936 film about marijuana, two books, a 2004 off-Broadway musical satirizing the original film (made into a movie in 2005), and a song by Hawkwind.
1936 "Reefer Madness" (originally named Tell Your Children) was a low-budget propaganda film financed by a religious group to broadcast the dangers of marijuana. It was directed by Louis Gasnier, who had well learned the silent era craft of over-acting. Its cast was composed of mostly unknown bit actors (Thelma White, Dorothy Short & Dave O'Brien).