context: Exocrine pancreatic insufficiency ( EPI) causes problems in how you digest food. Your pancreas doesn't make enough of the enzymes that your body needs to break down and absorb nutrients. Enzymes speed up chemical reactions in your body. The enzymes made by your pancreas move into your small intestine, where they help break down the food you eat. When you have EPI, you don't get the nutrition you need because your body can't absorb fats and some vitamins and minerals from foods. You might lose weight or have pain in your belly. There are drugs that work for most people that give you a new supply of enzymes, so you can go back to digesting food the right way. Besides taking medicine, you can manage your symptoms by making sure you follow the right diet. Your doctor will recommend foods that will help you get enough nutrients and protein that you might be missing. Damage to your pancreas causes EPI. There are many reasons this can happen but some of the most common are: Your pancreas gets inflamed often. Doctors call this chronic pancreatitis. It happens when the enzymes made by the pancreas start working while they're still inside it, before they get to the small intestine. You're at risk for this if you're a heavy drinker, though there can be other causes as well. For instance, your pancreas could get inflamed if some passageways in it are blocked or if you have very high levels of triglycerides (a type of blood fat) or an immune system disorder. You've had surgery on your pancreas, stomach, or intestines. You have one of these inherited diseases: Cystic fibrosis Shwachman- Diamond syndrome If you have cystic fibrosis, your body makes unusually thick and sticky mucus. This mucus blocks passageways in your pancreas and stops enzymes from getting out. If you have Shwachman- Diamond syndrome, you may be missing cells in your pancreas that make enzymes. Crohn's disease and celiac disease can also lead to EPI in some people. You may not have any symptoms at first. But once your pancreas gets so damaged that it starts to hurt your ability to absorb fat, you may get some symptoms, such as: Pain or tenderness in your belly Bad-smelling bowel movements Diarrhea Gas Feeling full You might also lose weight and get other problems, because your body doesn't absorb enough vitamins. For instance, you could develop a bleeding disorder if you're not getting enough vitamin K. Or you could get bone pain if you don't get enough vitamin D. Your doctor may diagnose your condition by checking your symptoms. He may ask you questions such as: Do you have pain in your upper belly? Have you had bad-smelling bowel movements that are oily and hard to flush down the toilet? Do you have gas or diarrhea? Have you lost weight? Several tests can help diagnose EPI. First, you may need some blood tests that check to see if you're getting enough vitamins and that your pancreas is making enough enzymes. Other blood tests can check for things that can lead to EPI, like celiac disease. You may also need to take the "3-day fecal test." It checks for the amount of fat in your bowel movements. You'll need to collect samples of your stool in special containers for 3 days. Your doctor may also ask you to take a test called "fecal elastase-1." For this, you also need to collect a sample of your bowel movement in a container. It will be sent to a lab to look for an enzyme that's important in digestion. The test can tell you if your pancreas is making enough of it. You may also need to get some tests that check to see if your pancreas is inflamed, including: CT scan. This uses a powerful X-ray to make detailed pictures inside your body. MRI. It uses strong magnets and radio waves to make pictures of organs and structures inside your body. Endoscopic ultrasound. This test uses sound waves to take pictures inside your digestive system. The sound waves are sent out by a thin tube that your doctor places through your mouth into your digestive system. When you find out you've got EPI, you'll probably have a lot of questions. You may want to start by asking your doctor: What treatments do you recommend? Do I need to follow a special diet? Are there vitamins I should take? Can I drink alcohol? What can I do if I'm losing weight? Apart from a healthy diet, the main treatment for EPI is pancreatic enzyme replacement therapy ( PERT). You take prescription pills that replace the enzymes your pancreas isn't making. These enzymes break down your food so you can more easily digest and absorb it. You have to take them during your meals. If you take them before you eat, the replacement enzymes may move through your stomach before your food gets there. If you take the pills after you eat, you have the opposite problem. You may also need to take an antacid to keep your stomach from breaking down pancreatic enzymes before they can start to work. There are six FDA-approved pancreatic enzyme products that are only available by prescription: Creon Pancreaze Pertzye Ultresa Viokace Zenpep You may also need medicine to treat pain. Usually you start with pain medicines such as acetaminophen ( Tylenol) or ibuprofen ( Advil, Motrin). If those don't bring you relief, your doctor may prescribe stronger pain drugs, such as hydrocodone and oxycodone. Keep in mind that ibuprofen may lead to stomach distress and that drugs such as hydrocodone and oxycodone should be used with caution because of addiction potential. The right diet is very important for managing EPI. A dietitian can help you choose the foods that keep your energy level up and give you the nutrition you need. Here are a few tips: Eat six small meals per day. Try that instead of the traditional three. A big meal might not be appealing if you have digestion troubles from EPI. Don't drink. Alcohol can make it even harder for your body to absorb fat, and can damage your pancreas over time. Take vitamins. You may need to take vitamins A, D, E, and K to replace ones that aren't getting absorbed from your diet. You can manage the symptoms of EPI by taking enzyme replacements and following an eating plan that gives you the right nutrition. Make sure you get the advice of a dietitian or nutritionist. One of your big challenges is to make sure you don't lose weight. A nutritionist can help you choose foods that have enough protein and nutrients. Also, talk with your family and friends to get the support you need while you're getting treatment. Ask your doctor about support groups, which let you talk to others who are going through the same things you are. You can find more information about pancreas problems by visiting the web site of the National Pancreas Foundation. You can also learn more by visiting the web sites of the Cystic Fibrosis Foundation and the Shwachman- Diamond Syndrome Foundation.