Pan 40mg is a medication used to treat conditions related to excess stomach acid production, such as acid reflux, gastritis, and ulcers. It belongs to a class of drugs known as proton pump inhibitors (PPIs), which work by reducing the amount of acid produced in the stomach. Pan 40mg can help alleviate symptoms like heartburn, indigestion, and stomach pain. It's typically taken orally, usually before meals. However, it's important to use this medication as directed by a healthcare professional and to be aware of any potential side effects or interactions with other medications.