Carolyn - Ideally it would be best for you to talk directly to his doctor and find out why Elavil is being prescribed. Elavil's primary uses are for depression and anxiety. Occasionally it will be prescribed for sleep because it can be highly sedating and at times it is used for relief of chronic pain. It also has other uses but I could not see the connection to a prostate condition. You should be aware that it is apparently not recommended for men with an enlarged prostate because it may worsen the condition.   Rick Wirtz   Rick Wirtz is a Psychologist, not a Psychiatrist. Although the majority of Psychologists are not authorized to prescribe medications or give you specific advice about them, they typically have experience working with patients who take a variety of medications. The response above is not intended to diagnose or treat any medical or mental disorder. Any information given in a post about medication is for educational purposes only and primarily to aid you in having an informed discussion with your own physician.