Minisec 20 mg capsules contain Omeprazole, a proton pump inhibitor that reduces stomach acid production. Used to treat gastric and duodenal ulcers, GERD, and Zollinger-Ellison syndrome./Description: Minisec 20 mg capsules contain Omeprazole, which inhibits the H⁺/K⁺ ATPase enzyme system in the stomach lining, decreasing gastric acid secretion.. Please Note that product description, color, ingredients, package and other information maybe different from the original pack kindly check the product for more accurate details.