Comparative Pharmacology
Head-to-head clinical analysis: BUTABARBITAL SODIUM versus BUTALBITAL ACETAMINOPHEN CAFFEINE AND CODEINE PHOSPHATE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BUTABARBITAL SODIUM versus BUTALBITAL ACETAMINOPHEN CAFFEINE AND CODEINE PHOSPHATE.
BUTABARBITAL SODIUM vs BUTALBITAL, ACETAMINOPHEN, CAFFEINE AND CODEINE PHOSPHATE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Depresses neuronal activity in the reticular activating system by enhancing GABA-A receptor-mediated chloride influx, increasing the duration of chloride channel opening and inhibiting excitatory neurotransmission at high doses.
Butalbital is a barbiturate that enhances GABA-A receptor activity, producing sedation; acetaminophen inhibits cyclooxygenase (COX) enzymes centrally, reducing pain and fever; caffeine is a nonselective adenosine receptor antagonist, causing vasoconstriction and central nervous system stimulation; codeine is an opioid agonist at mu-opioid receptors, providing analgesia and antitussive effects.
Sedative: 15-30 mg orally 3-4 times daily. Hypnotic: 50-100 mg orally at bedtime. Maximum single dose: 100 mg. Maximum daily dose: 300 mg. Route: oral, intramuscular, intravenous. For IM/IV: divide oral dose by 2.
1-2 capsules orally every 4 hours as needed for pain, not exceeding 6 capsules per day. Each capsule contains butalbital 50 mg, acetaminophen 300 mg, caffeine 40 mg, and codeine phosphate 30 mg.
None Documented
None Documented
Terminal elimination half-life: 30-50 hours; accumulates with repeated dosing, prolonged in hepatic impairment
Butalbital: ~35 hours (range 30-50 h), long-acting barbiturate; Acetaminophen: ~2-3 hours; Caffeine: ~3-5 hours in adults; Codeine: ~2.5-3.5 hours; note that codeine's active metabolite morphine has half-life ~2-3 h, and renal impairment prolongs half-life of butalbital and codeine.
Renal: 50-70% as metabolites (hydroxylated and conjugated forms), 5-10% unchanged; fecal: minor (<5%)
Butalbital: ~60-70% renal as unchanged drug and metabolites; Acetaminophen: ~90-100% renal within 24 hours (2-5% unchanged, rest as glucuronide and sulfate conjugates); Caffeine: ~1-2% renal unchanged, rest metabolized; Codeine: ~90% renal (10% unchanged, 40% as codeine-6-glucuronide, rest as morphine and norcodeine metabolites). Biliary/fecal excretion minimal for all components.
Category C
Category D/X
Barbiturate
Barbiturate + Analgesic