Giant Parasite Feeds Off People in '80s Movie

by Mandy Rose
(Peterborough, Ontario, Canada)

I'm looking for an '80s movie that involves an alien parasite or worm or snake that crawls into people's bodies and kills them by feeding off of them.

The movie begins with a man strapped down to a table or chair and a parasite entering his body. Later on in the movie, the guy somehow uses sound waves to get the thing out of his body. Once it is out, it needs to find other hosts and then starts killing people.

In one scene, it gets a hold of a young woman when she is sleeping and kills her.

Does anyone remember this movie and do you know the name of it? Thank you in advance!