Hi on metformin 3 a day since July and started getting thirst and blurred vision again 2 weeks ago.Went to see diabetic nurse and she gave me bg monitor tested before breakfast yesterday was 17 then before dinner 28 tested again this morning before breakfast down to 12.6.She has put me on Gliclazide half a tablet in the morning and half at night.My question is this normal to go on this drug and any bad side effects?thanks