Buy Fioricet 40mg, is used to treat tension headaches and other primary headaches. Acetaminophen is a fever and pain reliever. Acetaminophen's effects are enhanced by caffeine. Barbiturates, or acetaminophen, caffeine, and butalbital, are a class of drugs. It works by slowing down the brain's nerve impulses that cause pain in migraines and cluster headaches. The combination medication Fioricet...