Dear Doctor: Is your ED medication causing back and leg pain?

Dear Doctor Roach: I’m a 61-year-old man who is in very good health and works out regularly. I’ve begun to experience minor erectile dysfunction (ED). My general practitioner prescribed tadalafil (Cialis) at 20 mg. After the second dose (in a span of five days), I began to experience severe pain in the back of my legs and glutes.