One effective drug for treating tension headaches is fioricet. Its ingredients, which include caffeine, butalbital, and acetaminophen, combine to relieve headache discomfort. Acetaminophene is a barbiturate that helps relax muscles; however, butalbital is a pain reliever and fever reducer. Blood artery constriction caused by caffeine can lessen the severity of headaches. When used as prescribed, Fioricet can quickly and effectively relieve tension headaches so you can resume your regular activities without being sidetracked by discomfort.