All I can remember is one scene from the movie

So all I know is that it is old. I saw it when I was a kid and one scene sticks out. There is a worm in a bottle of some kind of alcohol and someone drinks it. Later the worm grows inside of them and comes back out of the mouth. The body is reduced to near skeletal features, covered on blood. Beyond this one scene I have no other clues to go by. Please help! It has bothered me for years and all searches have given me nothing.