Comparative Pharmacology
Head-to-head clinical analysis: BUTALBITAL ACETAMINOPHEN CAFFEINE AND CODEINE PHOSPHATE versus SECOBARBITAL SODIUM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: BUTALBITAL ACETAMINOPHEN CAFFEINE AND CODEINE PHOSPHATE versus SECOBARBITAL SODIUM.
BUTALBITAL, ACETAMINOPHEN, CAFFEINE AND CODEINE PHOSPHATE vs SECOBARBITAL SODIUM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
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.
Secobarbital enhances the activity of gamma-aminobutyric acid (GABA) at GABA-A receptors, increasing chloride ion influx and causing neuronal hyperpolarization, leading to CNS depression.
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.
Oral: 100-200 mg at bedtime for insomnia; IM: 150-200 mg as a single dose; IV: 50-250 mg as a single dose, administered slowly (not to exceed 50 mg per 15 seconds).
None Documented
None Documented
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.
Terminal elimination half-life is approximately 15-40 hours (mean ~30 hours) in adults. In neonates, half-life may be prolonged (up to 100 hours). Half-life increases in hepatic impairment and with advanced age.
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.
Renal excretion of unchanged drug (about 25-50%) and metabolites; the remainder is eliminated via hepatic metabolism and fecal excretion. Less than 5% is excreted unchanged in feces.
Category D/X
Category D/X
Barbiturate + Analgesic
Barbiturate