Altered States (1980) is a Horror, Science Fiction, Thriller film that follows a research scientist explores the boundaries and frontiers of human consciousness. Using sensory deprivation and hallucinogenic mixtures from Native American shamans, he explores these altered states of cognizance and finds that memory, time, and reality itself are states of mind. Currently, you can watch Altered States on Amazon Video, Apple TV Store, Google Play Movies, YouTube. Streaming availability may vary by country and platform over time. It has a user rating of 6.7 out of 10 from 750 votes. Fans of horror movies may also want to explore similar titles below.