Movies like Altered States

This body horror classic revolves around the themes of transformation and the unintended consequences of scientific experimentation, much like Altered States. The Fly's grotesque metamorphosis parallels the transformative journey in Altered States, appealing to fans of science-driven horror.

Dealing with themes of trauma, reality, and the human mind, Jacob's Ladder provides a similarly unnerving and surreal experience. It immerses audiences in a nightmarish journey that fans of the psychological depth in Altered States would likely find compelling.

Videodrome is a provocative exploration of technology, media, and body horror. Like Altered States, it dives deeply into the characters' psyches, blurring the lines between reality and hallucination, and is a must-watch for those who appreciate psychologically challenging films.

Scanners is a science fiction horror film that shares Altered States' interest in the dark and dangerous side of human consciousness and psychic abilities. Using a frightening world of telepathic and telekinetic individuals, this movie provides a similarly intense experience.

Focusing on virtual reality and its impact on the human brain, The Lawnmower Man explores the boundaries of human potential when technology interferes, akin to the transcendental and consciousness-expansion themes found in Altered States.

Flatliners follows a group of medical students who experiment with near-death experiences. The film touches on the exploration of consciousness and the afterlife, echoing the boundary-pushing scientific inquiry central to Altered States.