The Mechanism of action of Fioricet

The roles and interactions of the combination of acetaminophen, butalbital and caffeine in the treatment of tension headaches are not well understood. But the different mechanisms of action of acetaminophen, or butalbital, or caffeine are well understood. The mechanism of action of acetaminophen Acetaminophen:  Acetaminophen acts primarily in the CNS and increases the pain threshold by inhibiting …