Before bowel prep
There are many different types of bowel prep medicine. You and your doctor will choose the best one for you. This choice will be based on your age, your health, other medicines you take, the cost to you, and your preferences.
To help choose the best bowel prep method for you:
- Tell your doctor what medicines you take. Include both prescription and over-the-counter medicines. Also include vitamins, herbs, and supplements. Your doctor may tell you to stop taking some medicines, like blood thinners, before you start the bowel prep.
- Tell your doctor about any allergies, infections, or conditions you have, such as diabetes, heart failure, or liver disease. These may affect the safety and effectiveness of the bowel prep.
- Tell your doctor if you think you may have trouble drinking large amounts of fluid over a short period of time.
- Read all your bowel prep instructions before the day you start the bowel prep. You may need to plan or buy certain things. Or you may have questions to ask your doctor.
During bowel prep
Your doctor will tell you exactly how to do the bowel prep. If something seems unclear, ask questions. Your doctor is here to help.
Starting the day before your procedure, you will need to be on a clear liquid diet. That means not eating any solid foods until after your test. Drinking large amounts of liquid with the bowel prep medicine helps clean out your colon. It also prevents dehydration. During this time, you can have:
- Water.
- Coffee and tea without milk or creamer.
- Clear broth or bouillon.
- Gelatin snacks without any fruit or toppings.
- Ginger ale.
- Lemonade without any pulp.
- Clear fruit juice like white grape or apple.
- Some sports or hydration drinks.
Stay away from orange juice and dairy products, like milk. These are not clear liquids. Also don't have any red- or purple-colored drinks or gelatin. These can affect the quality of a colonoscopy.
The afternoon or evening before your procedure, you will start taking the bowel prep medicine. You will take it over a few hours. For most bowel preps, whether liquids or pills, you will likely be told to take half of it in the evening and the rest in the morning about 5 hours before your appointment. This is called split-dosing and helps clean the bowel better.
During this time, stay close to a bathroom. You will start to have diarrhea. You may also have mild nausea, bloating, or stomach pain. Tell your doctor if these symptoms last a long time or get worse.