Omeprazole (GastroGard, Prilosec, UlcerGard) is a medicine classified as a proton pump inhibitor (PPI). It reduces the amount of acid that is in your pet’s stomach. It is used to treat and ...

Omeprazole is used to treat certain digestive conditions including stomach ulcers, duodenal ulcers, GERD, and esophagitis due to GERD. It’s also taken with antibiotics to treat H. pylori infection.