My HbA1C was 99 at diagnosis. Three months later it was 59, but I was getting pins and needle sensations in my hand. I reduced the Metformin I was taking from 2x500 to 1x500 per day. In May I stopped taking Metformin when my HbA1C dropped to 44.
Since then my pins and needles sensations have stopped, so it may have been due to vitamin B12 deficiency caused by Metformin. I have been taking B12 and Alpha Lipoic Acid to reduce the symptoms of neuropathy. I am having a B12 test as part of my next blood test.