Fioricet is a combination of acetaminophen (Tylenol) and butalbital, mainly used as a sedative. It's also prescribed to treat headaches and pain relief from tension or migraines, but, like any other medicine, side effects of Fioricet are also there.

Acetaminophen, butalbital, and caffeine are all included in Fioricet pills. Acetaminophen is a fever reducer and pain reliever, and Barbiturates are a class of medications that provides butalbital. It relieves tension headaches by relaxing muscular spasms. Caffeine is a stimulant for the central nervous system, and it improves blood flow by relaxing muscular spasms in blood vessels.Fioricet mainly used as a sedative and to treat headaches, but, like any other medicine, side effects of Fioricet are also there.