Atom Age Vampire(1960)

Original title: Seddok, l'erede di Satana

When a singer is horribly disfigured in a car accident, a scientist develops a treatment which can restore her beauty by injecting her with a special serum. While performing the procedure, however, he falls in love with her. As the treatment begins to fail, he determines to save her appearance, regardless of how many women he must kill for her sake.