Wet wipes and apple juice: How to prepare for your first colonoscopy

NEW YORK – When patients come to me for their first colonoscopies, the first thing I usually say is: “Congratulations!”

As a gastroenterologist, I applaud them for doing something important for their health and share in their joy that the hardest part of the colonoscopy process – the preparation – is behind them.

Whether a colonoscopy is in your future because your doctor would like to investigate symptoms such as chronic diarrhoea or rectal bleeding, or you are being screened for colorectal cancer, you will need to prepare.

I spoke with other experts who shared tips on how to make the experience smoother.

Not your grandfather’s colonoscopy

If you have heard about colonoscopies from family members or friends, you may be surprised by how much the preparation and procedure have changed from prior generations.

You will still have to cleanse your colon beforehand, but there are many new laxative options – in liquid, powder and pill form — that will not require you to chug more than a dozen cups of salty formula in one sitting.

The colonoscopy procedure itself has also modernised. There are now safer ways to puff up the colon to hunt for precancerous growths, better cameras to aid in the hunt and more sophisticated techniques for removing abnormal tissue.

In fact, colonoscopies have become so much safer and more comfortable for my patients that it is common for them to wake up after the procedure and ask, “Is that it?” or “When are we starting?”

Colonoscopies, like all procedures, can come with certain serious – yet rare – risks. And your preparation instructions will vary depending on your medical needs and the specific laxatives you are prescribed, so it is important to review everything with your physician in advance.

Before the purge

On the day before your colonoscopy, you will begin the famous bowel preparation. This involves starting a clear liquid diet, and taking laxatives that cleanse your colon.

Laxatives are split into two doses: one taken the night before the procedure and another taken the morning of. A poor prep is the reason up to a quarter of colonoscopies cannot be completed.

“A very substantial portion of precancerous lesions in the colon are quite subtle,” said Dr Douglas Rex, a gastroenterologist and professor of medicine at Indiana University School of Medicine. “In order to see those well, the colon has to be clean.”

Three days before your colonoscopy: Cut out high-fibre foods such as nuts, seeds, whole-wheat bread and raw vegetables, as they take longer to pass through your digestive tract and can make it harder for your physician to see inside your colon.

Some people think of the few days before their liquid diet as their last chance to eat well, but overindulging can set you back. The more you eat, the more your body will need to expel.

The day before your colonoscopy: When you wake up the day before your procedure, you will start a strict clear liquid diet. Water, chicken broth and apple juice are allowed, as are foods such as pulp-free popsicles or even Jell-O, as long as everything is clear or light in colour.

Black coffee and tea also count as clear liquids, “so your mornings don’t have to be totally ruined”, said Dr Audrey Calderwood, director of The Comprehensive Gastroenterology Center at Dartmouth Hitchcock Medical Center.

Usually by the afternoon or evening, you will be instructed to take the first dose of your prep, so plan for a cosy night in and stay close to the bathroom.

If your prep needs to be mixed with another liquid, that liquid must be clear, but do not be afraid to get creative with flavour combinations. Ginger ale, fruit juice, sports drinks or tea can make the solution more palatable. You can even try a savoury version by mixing in the flavour packet from ramen noodles.

Some people find the taste of certain preps unpleasant, so if you get queasy easily, ask your physician in advance for anti-nausea medication. Drinking your prep solution with a straw can help limit how much of it you smell. Sucking on mints or menthol lozenges between sips can also help blunt any bad tastes.

Chilling the prep in the refrigerator can also help with the taste; just avoid using ice if you are not going to drink it quickly, Dr Calderwood said. When the ice melts, it will dilute the mixture, resulting in more volume to drink.

And whatever you do, do not drink alcohol the day before your procedure. While it technically might be a clear liquid, alcohol can cause dehydration and interfere with sedation, which can make for a dangerous combination.

The purge will happen anywhere from a few minutes to a few hours after starting your laxative, so stock up beforehand on gentle toilet paper, or wet wipes with soothing witch hazel or aloe vera.

The morning of your colonoscopy: Several hours before your procedure, you will likely be instructed to take the second dose of the prep. You will also need to stop drinking all liquids at least two to four hours before your scheduled procedure, as directed by your physician.

By this point, your stools should be liquid and see-through. If they are not, be honest with your doctor.

“The last thing you want is to put in all this effort, take time off and then the job doesn’t get done,” Dr Rex said.

It is normal for patients who have certain conditions or who are on certain medications to take longer to prep adequately, so be sure to review your medical history with your physician. Sometimes, simply taking the bowel prep for one more day will solve the problem.

It is very important that you follow your doctor’s instructions carefully in advance of your procedure. If you do not, you will have to go through the process again much sooner – within one year as opposed to up to 10 years, as is recommended for most people with a normal examination and a clean prep.

The bottom line

For many people, Dr Calderwood said, the psychological aspects of preparing for a colonoscopy are more challenging than the physical ones.

You will have to contend with diarrhoea, a lack of solid food for 24 hours and sedation for a procedure – all of which can feel overwhelming.

“It’s almost like gearing yourself up to run a marathon,” she said. But just remember, it is not an insurmountable task. “Lots of people before you have done it and are doing it every day.” NYTIMES