Some drugs are OK with the CAA one is Metformin
My blood sugar levels had been progressively increasing over the last couple of years and eventually my AME (ex-SAS - an interesting character!) put me onto Metformin. He said it had the least unpleasant side-effects and one beneficial one - weight loss. He said "Chicks are taking it, purely for that reason!"
I've been taking Metformin for about nine months and combined with reasonable care about what I eat, has kept my fasting blood sugar levels in the range of 6.0 to 7.0 mmol/litre.
Losing weight is a good thing too, for reducing blood sugar levels. The pancreas produces less insulin with age, so less weight means more insulin per kilo.