Pan 40mg Injection is also used to prevent stress ulcers in seriously ill patients and is administered before anesthetic medication to help prevent aspiration-related complications. It belongs to a class of medicines known as proton pump inhibitors (PPIs). This medicine is administered into a vein by a healthcare professional and will only be given to you if your doctor thinks that an injection is more suitable for you at the moment than a tablet. The dose will depend on your underlying condition and how you respond to the medicine. Your doctor will decide the duration of treatment but you should keep on taking it as prescribed, even if your symptoms disappear quickly. You can increase the efficiency of the treatment by eating smaller meals more often and avoiding caffeinated drinks (like tea and coffee), and spicy or fatty foods.