This is a 2005 movie with Bruce Campbell that I thought was from the late 80s or early 90s. That’s really all you need to know but I’ll paste the wikipedia description below :

Man with the Screaming Brain is a 2005 science fiction/slapstick film co-written, produced, and directed by Bruce Campbell, who also stars. It is Campbell’s feature film directorial debut. The film was co-written by David Goodman and co-stars Ted Raimi.

The film centers on William Cole, a wealthy American executive who travels to Bulgaria with his wife, only for their marriage and lives to unravel after she begins an affair with their taxi driver, Yegor. A violent encounter with a vengeful maid leaves William and Yegor dead, but William is revived through a brain transplant that forces him to share his body with Yegor’s consciousness.