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metformin raises my blood sugar level

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Old 02-19-2012, 04:58 PM   #1
Join Date: Feb 2012
Location: gananoque ontario canada
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caymanboy HB User
metformin raises my blood sugar level

after years of controlling my sugar , my A1c started rising this year , when it reached 9.3 I agreed to increase my metformin, from 2 pills a day to 4 pills, but soon after 3 weeks I noticed my levels ( tests) were higher . normally in the AM ( fasting for 8 hours) I tested mid 8.5 , now on increased levels of metformin I am testing 13.2.
2 hours after meals test before metformin was 7.3, now it is 13.2. sometimes even higher. I can't figure out what is going on , and why is my sugar levels going up when I am taken a med that suppose to bring them down? I am taking 500mg 4 times a day , any ways I will being seeing my doctor soon and I hope he can answer this question. but thought I would ask this group if they ever heard of levels going up after taken metformin or heard of any medical conditions that may cause this .

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Old 02-19-2012, 09:04 PM   #2
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Re: metformin raises my blood sugar level

Are you testing in the middle of the afternoon, before bedtime, and during the night? The only thing I can think of is that it's possible you're going quite low during your sleep and the result is a rebound high in the morning. And, since you're not on insulin, there's no way to get a rebound high down.

Try setting your alarm for 3 AM and test (put your meter right beside your bed, maybe with a flashlight so you don't have to turn on a big light) and test. If you're low then, then it's definitely rebound high and the answer is to cut back on the metformin...maybe 3 pills/day instead of 4.


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