Interesting. I've known I'm T2 diabetic for around 20 years and I've progressed through lots of medication regimes, usually increasing dosages at regular intervals. Recently I've started injecting insulin. At first it did make some difference to my fasting BG figures, lately, however, they've started to creep up again. (10.2, 11.9, 11.1, 11.9 mmol over the last few days).
I think I'll have to come off metformin as I'm sure it's the cause of my stomach problems and my need to be within a minute of a toilet else suffer the rather obvious embarrassment of.....well, I'm sure you won't need me to elucidate further.