Brain Damage

Brain Damage is a 1988 comedy horror film about a strange parasite named Aylmer that leaves the elderly couple it has been living with to establish itself in the life of our poor young hero. The creature provides an infusion of addictive hallucinogens in exchange for human brains to eat. This is a tragic story, a hard movie to watch.

HorrorNews.net concludes:

“Brain Damage” will entertain you immensely but if you know someone who has a monkey on his/her back that they cannot shake, it will both bother & entertain you in equal amounts, because it will give you a sense of what this person is going through. Either way, you will never forget it. I know I never will for reasons I pray none of you will ever have to experience in your lifetime.

Moria gives it 4 out of 5 stars and calls it "a searing metaphor for drug addiction". Rotten Tomatoes has a critics score of 70%.