Pan 40 tablets work effectively when taken on an empty stomach. Pan 40 tablet uses - to reduce stomach, to treat stomach ulcers and other acidity-related problems. Pan 40 tablets contain pantoprazole as an active ingredient. It is a proton pump inhibitor and blocks the proton pumps in the stomach wall responsible for the production of acid. It also has anti-acid reflux actions. We should concern our doctor about the medical history.