Colonoscopy & Endoscopy Procedure Preparation

Preparing properly for your colonoscopy or upper endoscopy is one of the most important steps for a safe, accurate, and successful procedure. Following your physician’s instructions carefully helps ensure the doctor can clearly examine your digestive tract and complete your procedure without delays or repeat testing.

Below you’ll find general preparation guidelines for both procedures. Your physician may provide additional or customized instructions based on your medical history, medications, or specific procedure type.

Why Preparation Matters

A clean digestive tract allows your physician to:

  • Detect abnormalities more accurately

  • Identify polyps, inflammation, ulcers, or bleeding

  • Reduce the need for repeat procedures

  • Improve overall procedure safety and efficiency

Incomplete preparation can affect results and may require rescheduling.

Colonoscopy prep varies by physician. Click your doctor’s name to get started.

Colonoscopy Prep Instructions

Dr. Farzad Forohar, MD

Richard Feldstein, MD

Colonoscopy Prep Instructions

General Colonoscopy Preparation Guidelines

Before Your Colonoscopy

Your physician may ask you to:

  • Adjust or stop certain medications temporarily

  • Avoid iron supplements several days before the procedure

  • Discuss blood thinners, diabetes medications, or other prescriptions

  • Arrange for a responsible adult to drive you home afterward

Always follow the exact instructions provided by your care team.

Dietary Guidelines:

Several Days Before the Procedure

You may be asked to avoid:

  • Nuts and seeds

  • Corn or popcorn

  • Raw vegetables

  • High-fiber foods

Bowel Preparation

Your physician will prescribe a bowel prep solution or laxative regimen to clean the colon before your procedure.

It is important to:

  • Follow the timing exactly as instructed

  • Drink all recommended fluids

  • Stay near a restroom during preparation

Proper bowel cleansing is essential for accurate results.

Dietary Guidelines:

The Day Before the Procedure

Most patients will need to follow a clear liquid diet, which may include:

  • Water

  • Clear broth or bouillon

  • Apple juice or white grape juice

  • Sports drinks

  • Plain tea or coffee (without cream)

  • Gelatin desserts without red or purple coloring

  • Popsicles without fruit pieces or dairy

Avoid:

  • Red, blue, or purple liquids

  • Alcohol

  • Milk or cream-based beverages