I had Dapagliflozin 5 mg added to my 3 x Metformin prescription when my A1c was very high. It didn't noticeably reduce it, but switching to a low carb diet months later did. The dapa does give me bouts of constipation, one was very severe. I am keen to come off my meds, but with GP's agreement, now relegated to pharmacist, so far not forthcoming.