I'm relatively new myself but not too new to insult your doctor! My doc said about me possibly coming off metformin as my figures are good (& I wont insult my doc by suggesting they could be wrong as I have to see them again!) Anyway I stayed on 1 tablet as it's still early days for me, it sounds like you have more sense than the doc, as you have pointed out metformin will also help with weight loss. Only defence I can come up with is doc may know of metformin not being compatible with other meds? But you're definately due a better explanation that the "can't come off it" rubbish he's spouing right now