Fioricet is a drug providing combined anti-fever and analgesic action. It contains active components butalbital, acetaminophen and caffeine. The drug is designed for headache relief, including pain associated with migraine.
Acetaminophen has analgesic and antipyretic effects, which means that it will help you get rid of the pain and a fever. It has a half-life (an abbreviated amount of time a decaying substance takes to decrease in half) of about 35 hours.
Butalbital comes from drugs named barbiturates. What it does is relax contracted muscles, which cause a headache. It has a half-life of about .25 to 3 hours. The last component of Fioricet is caffeine, a stimulant for our nervous system, which produces constriction of the cerebral blood vessels and therefore relaxes the contractions in them, resulting in an improved blood flow.
It has a half-life of 5 to 7 hours. These three components are distributed with 50 mg butalbital, 325 mg acetaminophen and 40 mg caffeine, in each tablet.