I'm looking for the name of a 90's or possibly late 80's sci-fi movie where people turn into monsters. All I can remember is a scene, near the end I think, where the main protaginist, I think, ends up turning into a monster. This means he's going to die, he cannot survive as a monster for whatever reason. The creature he turned into was long and squidlike in appearance, I think. I hope I didn't dream this.

Sounds like They Live with Roddy Piper