How to Prepare for your Colonoscopy

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

Any of the following liquids are OK to drink

Strained fruit juices (without pulp) including apple, orange, white grape, or white cranberry
Limeade or lemonade
Coffee or tea (DO NOT use milk or non-dairy creamer)
Clear broth or bouillon
Gelatin desserts without added fruit or toppings (NO RED OR PURPLE)

When to take HalfLytely and Bisacodyl Tablet Bowel Prep Kit

This product should be used the day before your colonoscopy. Your doctor will tell you when it is time to begin.

How to take HalfLytely and Bisacodyl Tablet Bowel Prep Kit

This product should be used the day before your colonoscopy. Your doctor will tell you when it is time to begin.


Step 1:
Take the bisacodyl tablet with water. Do NOT chew or crush the bisacodyl tablet. No antacids should be taken within one hour of taking the bisacodyl tablet.

Step 2:
Tear open one flavor pack of choice and pour into HalfLytely bottle. Discard unused packs. Solution can be used with or without flavor packs. Add drinking water to top of line on bottle. Cap bottle and shake to dissolve. The mixed solution will be clear and colorless. The solution should be used within 48 hours. The solution may be refrigerated.
Step 3:
After a bowel movement occurs (usually in 1 to 6 hours), begin to drink the solution. Begin drinking the solution after 6 hours even if a bowel movement has not occurred by then.
Step 4:
Drink 1 (8 oz) glass every 10 minutes. A watery bowel movement should begin in approximately 1 hour. Be sure to drink ALL of the solution. You will continue to have loose bowel movements for about 1 to 2 hours after finishing.

REMEMBER: DO NOT eat food or drink milk on the day of the prep (drink clear liquids only). If you have questions about using the HalfLytely and Bisacodyl Tablet Bowel Prep Kit, be sure to ask your doctor.

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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