Fioricet relieves tension headaches caused by muscle contractions. You can easily Buy Fioricet Online from this website. Fioricet is a combination medication. It contains the active ingredients acetaminophen, butalbital, and caffeine. Acetaminophen is a pain reliever that also helps to reduce fever. Butalbital is a barbiturate that aids in the relaxation of muscle contractions associated with tension headaches.