Oral Glucose Tolerance Test

Glucose Challenge Test, Glucose Tolerance Test, OGTT (Oral Glucose Tolerance Test)

What Affects the Test

Reasons you may not be able to have the test or why the results may not be helpful include:

• Taking certain medicines, such as corticosteroids, diuretics, seizure medicines, birth control pills, non-steroidal anti-inflammatory drugs (NSAIDs), and some medicines used to treat high blood pressure.
• Alcohol.
• Recent surgery, heart attack, or childbirth.
• A low-carbohydrate diet.
• Vomiting during the test.
• Emotional stress.
• Fever and infection.

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Author:	Caroline Rea, RN, BS, MS	Last Updated: September 14, 2007
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine Alan C. Dalkin, MD - Endocrinology Andrew Swan, MD, CCFP, FCFP - Family Medicine
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