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Conditions and Diseases > Diabetes Forum > Cause of High Blood Sugar
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Q: Cause of High Blood Sugar
asked by: efp1018 on November 25th, 2003
New User
I just had a blood test, and my blood sugar level came back high, after fasting. I need to get further tests, but I was wondering if there are other causes for hyperglycemia than diabetes. Any ideas?
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Dr. Nikola
replied on April 11th, 2008
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Blood glucose level should not be above 7 mmol/L two hours after eating. That is, in fact, the diagnostic criterion for diabetes. Anyway, diabetes can not be diagnosed based only on one glucose level measuring. Further testing, such as a fasting plasma glucose, random plasma glucose, or two-hour postprandial plasma glucose level, need to be performed.

What was your blood glucose level after fasting?

Other disorders, beside diabetes, that can cause hyperglycemia could be:

1. eating disorders (bulimia nervosa);
2. some medications (beta blockers, thiazide diuretics, corticosteroids, niacin, pentamidine, protease inhibitors, L-asparaginase,[1] and some antipsychotic agents);
3. acute stress such as stroke or myocardial infarction;
4. during times of infection and inflammation.
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