Usual Adult Dose of Fioricet for Headache: Acetaminophen 300 mg, butalbital 50 mg, and caffeine 40 mg: 1 or 2 capsule(s) orally every 4 hours as needed. Maximum daily dose: 6 doses. Acetaminophen 325 mg, butalbital 50 mg, and caffeine 40 mg: 1 or 2 tablet(s), capsule(s), or tablespoonful(s) orally every 4 hours. Maximum daily …
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