Comparative Pharmacology
Head-to-head clinical analysis: ALEVE PM versus INDOMETHACIN SODIUM.
Peer-Reviewed Evidence
Head-to-head clinical analysis: ALEVE PM versus INDOMETHACIN SODIUM.
ALEVE PM vs INDOMETHACIN SODIUM
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Diphenhydramine is a histamine H1 receptor antagonist that competes with histamine for binding at H1 receptor sites, reducing symptoms of allergic reactions and causing sedation. Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits cyclooxygenase (COX) enzymes, decreasing synthesis of prostaglandins, which reduces pain and inflammation.
Non-selective inhibition of cyclooxygenase (COX-1 and COX-2), reducing prostaglandin synthesis, leading to anti-inflammatory, antipyretic, and analgesic effects.
1 tablet (220 mg naproxen sodium / 25 mg diphenhydramine HCl) orally at bedtime as needed. Maximum: 2 tablets in 24 hours.
Intravenous: 0.5 mg/kg every 12 hours or 0.25 mg/kg every 6 hours for patent ductus arteriosus closure in neonates. Oral/immediate-release: 25-50 mg two to three times daily. Extended-release: 75 mg once daily or 75 mg twice daily. Maximum daily dose: 200 mg.
None Documented
None Documented
Naproxen: 12-17 hours (mean 13.6 hours); sufficient for twice-daily dosing; prolonged in renal impairment. Diphenhydramine: 2.4-9.3 hours (mean 5.5 hours); longer in elderly, hepatic impairment.
Terminal elimination half-life: 4.5 hours (range 2.6–11.2 hours); half-life may be prolonged in neonates, elderly, and renal impairment
Naproxen: renal (95% as unchanged drug and metabolites, primarily as naproxen and 6-O-desmethyl naproxen). Diphenhydramine: renal (50-60% as unchanged drug and metabolites, primarily as diphenhydramine and nor diphenhydramine); small amounts in feces.
Renal (60% as unchanged drug and metabolites, predominantly glucuronide conjugate); fecal (33%, primarily via biliary secretion); <5% unchanged in urine
Category C
Category D/X
NSAID/Antihistamine Combination
NSAID