From The Grindhouse Cinema Database
Synopsis: The late Dr. Campbell was experimenting with vampire bat blood just before his death. Fellow doctor Beecher finds a bottle of pills among Dr. Campbell's effects and takes them home. Dr. Beecher's daughter accidentally substitutes the vampire blood pills for her father's migraine tablets. The kindly Dr. Beecher starts having blackouts, changing into a bloodthirsty monster by night...
Director: Paul Landres Writer: Pat Fielder Starring: John Beal, Coleen Gray, Kenneth Tobey, Dabbs Greer, Lydia Reed, Ann Staunton