Medical Health Encyclopedia

Stool guaiac test

How to prepare for the test:

Do not consume red meat, any blood-containing food, cantaloupe, uncooked broccoli, turnip, radish, or horseradish for 3 days prior to the test.

You may need to discontinue drugs that can interfere with the test such as vitamin C and aspirin if possible. Check with your health care provider regarding medication changes that may be necessary. Never discontinue or decrease any medication without consulting your health care provider.

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How the test will feel:

There is no discomfort when performed at home, because this test involves normal bowel functions. If stool is collected during a rectal exam, then there may be brief discomfort in the anal canal and rectum.

Why the test is performed:

This test is a screening test to detect blood in the gastrointestinal tract.

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