Rx Murder (also marketed as Rx for Murder and Prescription for Murder) is a 1958 American crime film directed by Derek Twist and written by John W. Gossage and Derek Twist. It is based on the 1955 novel The Deeds of Dr. Deadcert by Joan Fleming. The film stars Rick Jason, Lisa Gastoni, Marius Goring, Sandu Scott, Mary Merrall and Vida Hope. It was released on February 18, 1958, by 20th Century Fox.