I had a very high hba1c in the diabetic range and was prescribed metformin. I had a test 12 weeks later and my result was in the normal range. This has continued for the last 18 months with nothing even near pre-diabetes range. Lately I have seen 2 other GPS who remarked on my normal readings and that I was probably not diabetic as a second test is required to confirm it if there are no symptoms present.