How you prepare

Before you have an endoscopic mucosal resection, your doctor will want to know your health history and the medications you use.

You'll be asked to provide the following information:

  • The names and doses of all prescription medications, over-the-counter drugs and dietary supplements you take — especially diabetes medications and blood-thinning drugs, including aspirin
  • Whether or not you have or ever had a drug allergy and, if so, the name of the drug
  • All medical conditions you have, especially heart disease, lung disease, diabetes and blood-clotting disorders

Food and medications

You'll receive written instructions about what to do the day before the procedure, including:

  • Fasting. You may not be able to eat or drink for many hours before the procedure. This is called fasting. Often, fasting begins at midnight before your procedure, but the specific start time can vary. You'll be instructed when to begin. You may also not be able to smoke or chew gum during this time.
  • Waiting to take certain medications. Your doctor may ask you to temporarily stop taking some medications, such as those that affect blood clotting or interfere with sedatives, before the procedure.

Other precautions

Other instructions may vary depending on the location of the lesion or lesions being removed. If the procedure involves the colon, you'll likely need to use a liquid laxative or an over-the-counter enema kit to empty your bowels and clean your colon.