Esomeprazole exerts its stomach acid-suppressing effects by preventing the final step in gastric acid production by covalently binding to sulfhydryl groups of cysteines found on the (H+, K+)-ATPase enzyme at the secretory surface of gastric parietal cells. This effect leads to inhibition of both basal and stimulated gastric acid secretion, irrespective of the stimulus. As the binding of esomeprazole to the (H+, K+)-ATPase enzyme is irreversible and new enzyme needs to be expressed in order to resume acid secretion, esomeprazole's duration of antisecretory effect that persists longer than 24 hours

Amoxicillin is similar to penicillin in its bactericidal action against susceptible bacteria during the stage of active multiplication. It acts through the inhibition of cell wall biosynthesis that leads to the death of the bacteria.

Clarithromycin acts by inhibiting microsomal protein synthesis in susceptible organisms mainly by binding to the donor site on the 50S subunit of the bacterial ribosome and preventing translocation to that site.

This combination is indicated for the eradication of H. pylori in active chronic gastric, duodenal and gastric ulcers.

Each tablet twice daily for 7-14 days or as per the physician’s advice

This is contraindicated in patients with known hypersensitivity to any of its component.

H. pylori eradication therapy is generally well tolerated. Adverse events reported during clinical trials were not unexpected given the component substances. Common adverse reactions included diarrhoea and nausea.

Serious and occasionally fatal hypersensitivity reactions have been reported in patients on Amoxicillin therapy. These reactions are more apt to occur in indivduals with a history of penicillin hypersensitivity. Clarithromycin should not used in pregnant women except in clinical circumstances where no alternative is appropriate.

Use in Special Populations

GERIATRIC USE: Although this regimen has not been specifically studied in the elderly, dosage adjustment is not needed during therapy with individual components. It is therefore unlikely to require dosage adjustment with this combination

Pregnancy & Lactation

This should only be given to pregnant women if its use is considered essential. The safety of this combination for use during breast feeding of infants has not been established.