butalbital,

Fioricet is an Acetaminophen-based pain reliever and fever reducer. Aside from caffeine, it also contains butalbital, an ingredient that helps promote relaxation. This medicine should only be taken in the manner prescribed by your doctor.

Fioricet, best pain relivers now a days. Fioricet also known as Acetaminophen, used for fever reduction and pain relief. It is also known as Butalbital, used for relaxing the muscles.