Altered States (1980) - Trailer HD 1080p

Altered States is a 1980 American science-fiction horror film directed by Ken Russell based on the novel of the same name by playwright and screenwriter Paddy Chayefsky. The film was adapted from Chayefsky's only novel and is his final screenplay. Both the novel and the film are based on John C. Lilly's sensory deprivation research conducted in isolation tanks under the influence of psychoactive drugs like mescaline, ketamine, and LSD. It marked the film debut of William Hurt and Drew Barrymore. Chayefsky was credited as a screenwriter for the film using the pseudonym Sidney Aaron, his actual first and middle names.

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