Pantoprazole is an irreversible inhibitor at proton pumps in the gastric mucosa. It irreversibly binds to these pumps and prevents protons, which are essential for the formation of gastric acid, from entering the stomach.
Panotprazole is absorbed in the intestine and reaches its highest plasma concentration at 2-3 hours after ingestion. Oral bioavailability is approximately 77% and plasma protein binding is approximately 98%. The active substance is degraded by the CYP-450 system in the liver and the majority is subsequently excreted in the urine.