Hi Louise
I have just spotted your post. Have you changed GPs yet?
Most diabetics would need to be taking metformin with gliclazide as insulin sensitivity is often a problem. Metformin would help the insulin produced as a result of the gliclazide to work more effectively. Rather then gliclazide with metformin, you might want to see if your GP will prescribe one of the newer diabetes drugs such as Byetta with metformin. Gliclzide forces your pancreas to produce insulin independent of the amount of sugar in your blood. Byetta will get the pancreas to produce insulin only if it is needed. In my book that has to be better.
Let us know how you get on.
Regards
Doug