Diabetes Questions - Metformin
Answered by Tamara Kurtis Randall, MS, RD, LD
Q. I've been recently diagnosed with Diabetes and started taking metformin
for three weeks.
My back and ankles itch terribly. Is this related? What
do I do?
A. Dry, itchy skin may be a result of high blood sugar. It is not, however, a
common side effect of metformin.
If you continue to itch and your blood
sugar is in the target range (between 80 - 120 mg/dl fasting and before
meals, under 160 mg/dl 2 hours after meals and 100 - 140mg/dl before bed),
call your physician for advice.
Q. I just started taking insulin (Lantis) and I take Metformin and after
about 2 weeks I got really, really sick (not related to Diabetes, just bad
My numbers went into the 60's. My doctor wants me to be about 140. I
took the Lantis anyway, when it was time, but I was very concerned that the
numbers would go too low. I didn't take the metformin. I drank some pop with
sugar and the numbers still stayed low.
My question is - in the future,
should this happen again where the numbers are so low, do I go ahead and take
What about the Metformin? Thank you.
A. It's common for your blood sugar to be higher or lower than normal when you
are sick, but you still need to take your medications and insulin as
The best advice I can give is to talk to your physician about
putting together a plan for when you are sick.
For examples of what should
be included in the plan, visit the Diabetes Association of Greater
Cleveland's sick day info
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