Comparative Pharmacology
Head-to-head clinical analysis: PRILOSEC OTC versus YOSPRALA.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PRILOSEC OTC versus YOSPRALA.
PRILOSEC OTC vs YOSPRALA
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Proton pump inhibitor that irreversibly inhibits the H+/K+ ATPase enzyme (proton pump) in gastric parietal cells, suppressing gastric acid secretion.
Yosprala is a combination of aspirin (a nonsteroidal anti-inflammatory drug that inhibits cyclooxygenase-1 and cyclooxygenase-2, thereby reducing thromboxane A2 synthesis and platelet aggregation) and omeprazole (a proton pump inhibitor that inhibits gastric acid secretion by binding to the H+/K+ ATPase enzyme in gastric parietal cells).
20 mg orally once daily for 14 days for frequent heartburn; may repeat 14-day course every 4 months.
YOSPRALA (esomeprazole magnesium and naproxen) is available as delayed-release tablets containing 375 mg naproxen/20 mg esomeprazole or 500 mg naproxen/20 mg esomeprazole. The typical adult dose is one tablet twice daily, swallowed whole with liquid, at least 30 minutes before meals.
None Documented
None Documented
Approximately 0.5–1 hour in healthy subjects; longer (up to 3 hours) in slow metabolizers or hepatic impairment. Clinically, the duration of acid suppression exceeds the half-life due to accumulation in parietal cell canaliculi.
Naproxen: terminal elimination half-life is approximately 14 hours (range 12–17 hours), allowing twice-daily dosing. Esomeprazole: terminal half-life is approximately 1.2–1.5 hours after single dose, increasing to ~1.5–2.5 hours with repeated dosing due to saturation of CYP2C19. Clinical context: naproxen's half-life supports sustained analgesic/anti-inflammatory effect; esomeprazole's shorter half-life requires daily dosing for acid suppression.
Primarily hepatic metabolism; about 80% of metabolites are excreted in urine, and the remainder in feces via bile. Less than 1% of unchanged drug is excreted in urine.
YOSPRALA (esomeprazole and naproxen) is a fixed-dose combination. Naproxen is primarily excreted in urine as unchanged drug (approximately 60%) and as glucuronide conjugates (approximately 30%). Esomeprazole is extensively metabolized; less than 1% of the dose is excreted unchanged in urine. Biliary/fecal elimination accounts for the remainder via metabolites.
Category C
Category C
Proton Pump Inhibitor
Proton Pump Inhibitor