Comparative Pharmacology
Head-to-head clinical analysis: DUEXIS versus EC NAPROSYN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DUEXIS versus EC NAPROSYN.
DUEXIS vs EC-NAPROSYN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
DUEXIS is a combination of ibuprofen, a nonsteroidal anti-inflammatory drug (NSAID) that inhibits cyclooxygenase (COX-1 and COX-2) enzymes, reducing prostaglandin synthesis, and famotidine, a histamine H2-receptor antagonist that decreases gastric acid secretion. Famotidine mitigates the risk of NSAID-induced gastric ulcers.
Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) enzymes, thereby reducing prostaglandin synthesis, which mediates inflammation, pain, and fever.
One tablet (800 mg ibuprofen/26.6 mg famotidine) orally three times daily.
500-1000 mg orally twice daily; maximum 1500 mg/day.
None Documented
None Documented
Ibuprofen: 2-4 hours (terminal); requires every 6-8 hour dosing. Famotidine: 2.5-3.5 hours (normal renal function); prolonged to 20 hours or more in severe renal impairment (CrCl < 30 mL/min).
Terminal elimination half-life 12-17 hours (mean 14 hours); prolonged in elderly and renal impairment
Ibuprofen: ~1% unchanged in urine, 14% as conjugated metabolites, remainder as oxidative metabolites; <1% excreted in feces. Famotidine: 65-70% unchanged in urine, 30-35% metabolized hepatic; <10% fecal.
Renal (95%) as unchanged drug (10%) and conjugated metabolites (60%) and other metabolites (25%); biliary/fecal (5%)
Category C
Category C
NSAID/H2 Antagonist Combination
NSAID