FAQs about Bisacodyl Laxative Tablets
& Bowel Prep Kits

When do I take the HalfLytely and Bisacodyl Tablet Bowel Prep Kit?

The HalfLytely and Bisacodyl Tablet Bowel Prep Kit should be used the day before your colonoscopy. Your doctor will tell you when it is time to begin.

Can I eat anything after I start taking HalfLytely and Bisacodyl Tablet Bowel Prep Kit?

No. You must not eat any food from the time you start taking HalfLytely and Bisacodyl Tablet Bowel Prep Kit until after you have your colonoscopy.

Remember that on the day before your procedure…

  • No solid food, clear liquids ONLY; please have nothing for dinner
  • DO NOT drink milk
  • DO NOT eat or drink anything colored red or purple

What should I tell my doctor before taking HalfLytely and Bisacodyl Tablet Bowel Prep Kit?

Before you take HalfLytely and Bisacodyl Tablet Bowel Prep Kit, tell your healthcare provider if you:

  • have heart problems
  • have stomach or bowel problems
  • have ulcerative colitis
  • have problems with swallowing or gastric reflux
  • have a history of seizures
  • are withdrawing from drinking alcohol
  • have a low blood salt (sodium) level
  • have kidney problems
  • have any other medical conditions
  • are pregnant. It is not known whether HalfLytely and Bisacodyl Tablet Bowel Prep Kit will harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant.
  • are breastfeeding or plan to breastfeed. It is not known if HalfLytely and Bisacodyl Tablet Bowel Prep Kit passes into your breast milk. You and your healthcare provider should decide if you will take HalfLytely and Bisacodyl Tablet Bowel Prep Kit while breastfeeding

You should not take this product if you are allergic to anything in it. See the end of the Medication Guide for a complete list of ingredients in HalfLytely and Bisacodyl Tablet Bowel Prep Kit.

Is HalfLytely and Bisacodyl Tablet Bowel Prep Kit for adults and children?

HalfLytely and Bisacodyl Tablet Bowel Prep Kit is indicated for cleansing of the colon as a preparation for colonoscopy in adults. Safety and effectiveness in pediatric patients has not been established.

What if I have trouble swallowing pills?

Please check with your doctor if you have trouble swallowing pills before you take the HalfLytely and Bisacodyl Tablet Bowel Prep Kit.

What if I am taking other medicines?

Tell your healthcare provider about all the medicines you take, including prescription and non-prescription medicines, vitamins, and herbal supplements. HalfLytely and Bisacodyl Tablet Bowel Prep Kit may affect how other medicines work. Medicines taken by mouth may not be absorbed properly when taken within 1 hour before the start of HalfLytely and Bisacodyl Tablet Bowel Prep Kit. It is a good idea to check with your doctor about when to take your other medicines while you are using the HalfLytely and Bisacodyl Tablet Bowel Prep Kit.

Especially tell your healthcare provider if you take:

  • medicines for blood pressure or heart problems
  • medicines for kidney problems
  • medicines for depression
  • water pills (diuretics)
  • non-steroidal anti-inflammatory medicines (NSAID) pain medicines
  • laxatives
  • antacids

Do not take the bisacodyl delayed-release tablet within one hour of taking an antacid.

Who should not take HalfLytely and Bisacodyl Tablet Bowel Prep Kit?

Do not take HalfLytely and Bisacodyl Tablet Bowel Prep Kit if your healthcare provider has told you that you have:

  • a blockage in your bowel (obstruction)
  • An opening in the wall of your stomach or intestine (bowel perforation)
  • problems with food and fluid emptying from your stomach (gastric retention)
  • a very dilated intestine (bowel)
  • an allergy to any of the ingredients in HalfLytely and Bisacodyl Tablet Bowel Prep Kit. See the end of the Medication Guide for a complete list of ingredients in HalfLytely and Bisacodyl Tablet Bowel Prep Kit.

Is HalfLytely and Bisacodyl Tablet Bowel Prep Kit safe for patients with diabetes?

There are no contraindications for use in patients with diabetes. However, you should always check with your doctor to see if this product is right for you.

Are the HalfLytely and Bisacodyl Tablet Bowel Prep Kit Flavor Packs sugar free?

Yes. The HalfLytely Flavor Packs are sugar free.

Is there any red dye in the Cherry Flavor Pack?

No, there is no red dye. The solution is clear and colorless.

Does HalfLytely and Bisacodyl Tablet Bowel Prep Kit contain gluten?

HalfLytely and Bisacodyl Tablet Bowel Prep Kit is a gluten-free product.

Can I add a liquid besides water to the HalfLytely bottle to dissolve the powder?

No. Add only lukewarm drinking water to the top line on the bottle. Cap the bottle and shake to dissolve the powder. The reconstituted solution may be refrigerated.


HalfLytely® and Bisacodyl Tablet Bowel Prep Kit is a combination of PEG-3350, an osmotic laxative and bisacodyl, a stimulant laxative, indicated for cleansing of the colon as a preparation for colonoscopy in adults. Most common adverse reactions (>3%) are overall discomfort, abdominal fullness, abdominal cramping, nausea, and vomiting. There have been reports of ischemic colitis in patients with use of HalfLytely and 10 mg or 20 mg Bisacodyl Tablets Bowel Prep Kit. Use is contraindicated in the following conditions: gastrointestinal (GI) obstruction, bowel perforation, toxic colitis and toxic megacolon, gastric retention, ileus. Use caution when prescribing for patients with a history of seizures, arrhythmias, impaired gag reflex, regurgitation or aspiration, severe active ulcerative colitis, impaired renal function or patients taking medications that may affect renal function or electrolytes. Patients with impaired water handling who experience severe vomiting should be closely monitored including measurement of electrolytes. Advise all patients to hydrate adequately before, during, and after use.

Click here for full Prescribing Information and Medication Guide

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