Obliteration

Obliteration (1984) is a horror directed by Paul Bunnell rated 8.0/10.

An experiment with a new kind of hallucinatory-drug from Africa goes terribly wrong for college student Jim Allen, and horrifically right for Professor Von Dorm. Jim is transported into another dimension as the professor conjures up evil spirits in an attempt to obtain eternal life. The bad guys win as Jim ultimately becomes "obliterated" from reality and is forever locked in a world governed by demons.