The site and mechanism for the analgesic effect of acetaminophen has not been determined but is thought to primarily involve central actions. Caffeine is a methylxanthine and CNS stimulant.

see APAP dosage Aspirin 650 mg + butalbital 50 mg Axotal® 1 tablet, q4h (max 6 tablets daily) Aspirin 300 mg + butalbital 50 mg + caffeine 50 mg Fiorinal® 1–2 tablets, q4h (max 6 tablets daily ...

see APAP dosage Aspirin 650 mg + butalbital 50 mg Axotal® 1 tablet, q4h (max 6 tablets daily) Aspirin 300 mg + butalbital 50 mg + caffeine 50 mg Fiorinal® 1–2 tablets, q4h (max 6 tablets daily ...