| Mechanism of Action
Aspirin (acetylsalicylic acid) is an inhibitor of both prostaglandin synthesis and platelet aggregation. The differences in activity between aspirin and salicylic acid are thought to be due to the acetyl group on the aspirin molecule. This acetyl group is responsible for the inactivation of cyclo-oxygenase via acetylation.
Omeprazole belongs to a class of antisecretory compounds, the substituted benzimidazoles, that suppress gastric acid secretion by specific inhibition of the [H+/K+]-ATPase enzyme system at the secretory surface of the gastric parietal cell. Because this enzyme system is regarded as the acid (proton) pump within the gastric mucosa, omeprazole has been characterized as a gastric acid-pump inhibitor, in that it blocks the final step of acid production. This effect is dose-related and leads to inhibition of both basal and stimulated acid secretion irrespective of the stimulus.
Drug UPDATES: YOSPRALA™ (aspirin and omeprazole) delayed-release tablets,
Initial U.S. Approval: 2016
INDICATIONS AND USAGE:
YOSPRALA is a combination of aspirin, an anti-platelet agent, and omeprazole, a proton pump inhibitor (PPI), indicated for patients who require aspirin for secondary prevention of cardiovascular and cerebrovascular events and who are at risk of developing aspirin associated gastric ulcers.
The aspirin component of YOSPRALA is indicated for:
The omeprazole component of YOSPRALA is indicated for decreasing the risk of developing aspirin associated gastric ulcers in patients at risk for developing aspirin-associated gastric ulcers due to age (= 55) or documented history of gastric ulcers. (1)
Limitations of Use:
|DOSAGE AND ADMINISTRATION: PDF
Recommended dosage: One tablet daily at least 60 minutes before a meal.
Do not split, chew, crush or dissolve the tablet.
81 mg delayed-release aspirin/40 mg immediate-release omeprazole
National Institutes of Health, U.S. National Library of Medicine, DailyMed Database.
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