Dr. Jekyll and the Werewolf(1972)

Original title: Doctor Jekyll y el Hombre Lobo

Waldemar Daninsky comes to swinging seventies' London, seeking a cure to his malady. Unfortunately, he meets Dr. Jekyll who injects him with a serum that turns him into the lascivious killer Mr. Hyde. In his top hat and black cloak, Hyde haunts the fleshpots of Soho, while two gorgeous women fight for possession of his wolfman soul...