Omeprazole and pantoprazole belong to a class of drugs called proton pump inhibitors. They are approved for treating ulcers, gastroesophageal reflux and other conditions caused by excessive acid in the stomach.
Famotidine inhibits the action of histamine on stomach cells and reduces the production of stomach acid in ulcers, acid reflux, and heartburn.
Sucralfate acts by providing a barrier over the area to protect the mucosa from acid attack, inhibit activity of the digestive enzyme pepsin in gastric juices, and absorb bile acids.