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. - to reduce stomach, to treat stomach ulcers, gastroesophageal reflux disease (GERD), and other acidity-related problems. This medicine works effectively when taken on an empty stomach. You should concern your doctor about your medical history, if you are pregnant, planning a pregnancy, or breastfeeding and about all the medicines and supplements you take or might take.