What is aspirin/butalbital/caffeine?
Aspirin is a pain reliever, as well as an anti-inflammatory and a fever reducer. Butalbital is in a class of drugs called barbiturates that slow down your central nervous system (brain and nerve impulses) and cause relaxation. Caffeine is believed to constrict dilated blood vessels (veins and arteries) that may contribute to tension headaches. Aspirin/butalbital/caffeine is used to relieve complex tension headaches, although precisely how it works is unknown. Aspirin/butalbital/caffeine may also be used for purposes other than those listed in this medication guide.