2 Hour Postprandial Glucose Test

What is a 2 hour postprandial glucose test?

A 2 hour postprandial glucose test is done to check your blood sugar 2 hours after a meal. You will be told what you should eat for the meal. You may be asked to drink a special glucose liquid instead of eating.

Why might I need a 2 hour postprandial glucose test?

You may need this test to learn if you have diabetes mellitus. Ask your healthcare provider for more information about diabetes mellitus. You may need the test if you have the following symptoms:

  • Blurred vision.

  • Excessive hunger.

  • Excessive thirst.

  • Excessive urination.

  • Unexplained weight loss.

How do I prepare for the test?

  • Your healthcare provider will give you instructions for the test.

  • Tell your healthcare provider if you did not finish the meal or drink, or if you vomit.

  • You need to rest for the 2 hours before your blood is taken. Activity can give a false blood sugar reading.

  • Do not smoke, eat, or drink during the 2 hours.

What do I do after the test?

After your blood is taken, the site will be covered with cotton and tape or a bandage. You may remove these after about 20 to 30 minutes. Ask when you will get the results of your test.

Care Agreement

You have the right to help plan your care. To help with this plan, you must learn about your lab tests. You can then discuss the results with your caregivers. Work with them to decide what care may be used to treat you. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

© 2014 Truven Health Analytics Inc. Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes. All illustrations and images included in CareNotes® are the copyrighted property of A.D.A.M., Inc. or Truven Health Analytics.

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