Having high sugar levels can cause all sorts of problems, from nerve damage, eye damage,
kidney failure and amputations due to poor circulation. So it is very important that you take the medication as prescribed as eat sensibly.
I was started on Metformin 500mg a week ago and I find I am fine. I take the medication after my evening meal as prescribed. I have been glucose intolerant for a number of years, but my last average reading went into the diabetic range.