Reefer Madness (originally made as Tell Your Children and sometimes titled as The Burning Question, Dope Addict, Doped Youth, and Love Madness) is a 1936 American film about drugs revolving around the melodramatic events that ensue when high-school students are lured by pushers to try marijuana—from a hit and run accident, to manslaughter, suicide, conspiracy to murder, attempted rape, hallucinations, and descent into madness from marijuana addiction. The film was directed by Louis J. Gasnier and featured a cast of mainly little-known actors.

Originally financed by a church group under the title Tell Your Children, the film was intended to be shown to parents as a morality tale attempting to teach them about the dangers of cannabis use. It is notable for being one of the few times in Hollywood where the generation gap between the Lost Generation and the Greatest Generation is portrayed. Soon after the film was shot, it was purchased by producer Dwain Esper, who re-cut the film for distribution on the exploitation film circuit, exploiting vulgar interest while escaping censorship under the guise of moral guidance, beginning in 1938–1939 through the 1940s and 1950s.