Back to Ask the Diabetes Team Ask the Diabetes Team

From Raeford, North Carolina, USA:

I have type 2 diabetes treated with Glucophage [metformin], and I also take Niaspan at bedtime to help lower triglycerides. On a normal day, my glucose reading is hardly ever over 130 mg/dl [7.2 mmol/L], but, when I have to fast before a doctor's appointment, my sugar reading is sky high when I get my blood results back. I am confused and upset about this as my doctor keeps increasing my medication on the pretense that I am not controlling my blood sugar myself. I tried to explain to him what had happened, but he just upped the medication. I also have researched and found that the Niaspan alters blood glucose! Is it possible to have higher readings while fasting than on a regular schedule? What's a person to do?


You are correct that Niaspan can antagonize blood sugars to a small degree. However, Niaspan has beneficial effects on the qualitative and quantitative abnormalities of lipids in your body that accompany type 2 diabetes.

I would also suggest that if there is this big difference in fasting lab glucose versus fasting fingerstick glucose, I would have a diabetes educator look at your meter to make sure it is giving you accurate information. You should also have a test called a hemoglobin A1c performed every three months. This test gives you your average daily blood sugar over the previous three months. It is more helpful managing the big picture, compared to having a fasting glucose on a single day. If your A1c is not at goal, your physician is correct to make interval changes in your medications to improve your overall level of control.


Original posting 8 Nov 2003
Posted to Blood Tests and Insulin Injections


  Back to Ask the Diabetes Team Return to the Top of This Page

Last Updated: Tuesday April 06, 2010 15:09:52
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.

This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents. Our mission is to provide education and support to families living with type 1 diabetes.
By using this site, you agree to our Terms of Use, Legal Notice, and Privacy Policy.
© Children with Diabetes, Inc. 1995-2018. Comments and Feedback.