coincidentally this first aired 26 March 1992

https://en.wikipedia.org/wiki/Back_to_Reality_(Red_Dwarf)

It has a similar concept based around a hallucinogen that makes you imagine a new reality that makes you despair to the point of suicide. In the episode the hallucination transitions into a separate reality (ostensibly the 'real' one) via the characters believing they've been in a VR game for 4 years, and just lost the game and awakened.

It has been described as a "classic episode [that] questions our certainty about what is real. It has us believing that what we thought was real was only a simulation of dream, only to reveal later on that the waking up was actually a falling asleep."