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Colyte Bowel Preparation

Get expert instructions on using Colyte for afternoon colonoscopy appointments. Ensure a thorough colon cleanse for accurate results with our guide!

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Texas Medical Board
Harris County Medical Society
American College of Gastroenterology
American Society for Gastrointestinal Endoscopy
Memorial hermann
Houston Methodist leading Medicine
HCA Houston Healthcare

Video Instructions

Written Instructions

General Instructions

2 Weeks Before the Procedure

Foods No change
Liquids Drink plenty of water
Medications Hold - GLP1 Agonist Medication:
  • Dulaglutide (Trulicity)
  • Exenatide (Byetta)
  • Exenatide Extended Release (Bydureon BCise)
  • Liraglutide (Victoza)
  • Lixisenatide (Adlyxin)
  • Semaglutide (Ozempic, Wegovy, Rybelsus)
  • Tirzepatide (Mounjaro)

1 Week Before the Procedure

Foods

No Nuts or Seeds - berries, cashews, corn nuts, peanuts, pecans, popcorn, walnuts

Low Fiber Diet

  • Foods - white bread, cheese, eggs, yogurt
  • Soups - clear vegetable, chicken or beef broth
  • Vegetables - cooked without skin like mashed potatoes
  • Fruits - pureed fruits without skin like applesauce
Liquids Drink plenty of water
Medications
  • Take as usual unless otherwise instructed
  • Hold - Anti-Diarrheal Medication - Imodium, Kaopectate, Pepto-Bismol
  • Hold - Iron Tablets
  • Hold - Multivitamins

Pharmacy

  • Fill or buy preparation medication
  • Pick up 3 days before your procedure

1 Day Before the Procedure

Foods
  • Clear Liquid Diet
  • Soups - clear vegetable, chicken or beef broth
  • Juices - clear only without pulp
Liquids
  • Drink plenty of water
  • No alcohol
  • No red or purple colored drinks
Medications
  • Hold - Oral Diabetes Medication
  • Insulin - Take ½ the dose the entire day
  • Blood Pressure Medication - The pre-anesthesia team (PAT) will instruct you on how to take your blood pressure medications.
  • All other medications - continue as normal

Procedure Day

Foods No food or liquids the day of the procedure

Medication Instructions

Attention

Expected Symptoms Do not stop the bowel preparation
  • Abdominal Pain
  • Bloating
  • Cramps
  • Diarrhea
  • Gas
  • Nausea

First Dosage → 10PM - 12PM

10PM - 12PM

Drink 8 ounces of the solution every 15 minutes until a half gallon is consumed

Second Dosage → 4AM - 6AM

4AM - 6AM

Drink 8 ounces of the solution every 15 minutes until the entire gallon is consumed

12AM

Foods No food or liquids after midnight except prep solution

Frequently Asked Questions

How much water should I drink with polyethylene glycol 3350?

Drink at least 8 ounces of water with each dose. If used for bowel prep, consume the entire prescribed volume, usually 3-4 liters, along with additional clear liquids to prevent dehydration.

Who should not take Colyte?

Avoid Colyte if you have bowel obstruction, toxic megacolon, perforated intestine, severe dehydration, or kidney disease. Consult a doctor if pregnant, on diuretics, or have electrolyte imbalances.

What is the Colyte solution for colonoscopy?

Colyte is a polyethylene glycol (PEG) electrolyte solution used for bowel cleansing before a colonoscopy. It flushes out the colon by drawing water into the intestines, causing frequent bowel movements.

How much water should I drink with polyethylene glycol 3350?

Drink an 8-oz glass of bowel preparation every 15 minutes until a half gallon is consumed. You may continue to drink clear liquids only until midnight.

When is the best time to take laxatives, morning or night?

It depends on the purpose. For occasional constipation, take at night for results by morning. For colonoscopy prep, follow your doctor’s schedule, usually evening and early morning.

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