I Was a Teenage Werewolf

I Was a Teenage Werewolf is a 1957 horror film starring Michael Landon as a troubled teenager, and Whit Bissell as the primary adult. It was cowritten and produced by cult film producer Herman Cohenand was one of the most successful films released by American International Pictures AIP. It was originally released as a double feature with Invasion of the Saucer Men. They included the tagline, We DARE You To See The Most Amazing Pictures Of Our Time

Tony declines, but his girlfriend Arlene Yvonne Lime, as well as his widowed father Malcolm Atterbury, show concern about his violent behavior. Later, at a Halloween party at the haunted house, an old house at which several of the teenagers hang out, Tony attacks his friend Vic Kenny Miller after being surprised from behind. After seeing the shocked expressions on his friendss faces, he realizes he needs help and goes to see Dr. Brandon.On Tonys first visit, however, Brandon makes it clear that he has his own agenda while the teenager lies on the psychiatrists couch Tony will be an excellent subject for his experiments with a scopolamine serum hes developed that regresses personalities to their primitive instincts. Brandon believes that the only future mankind has is to hurl him back to his primitive state. Although Brandons assistant, Dr. Hugo Wagner Joseph Mell, protests that the experiment might kill Tony, Brandon continues and within two sessions suggests to Tony that he was once a werewolf. ........

Source: Wikipedia