Like "You should be able to feel free to talk to your doctor about anything. You are not challenging him but trying to do what you feel is best for your own body. I would go in very positively towards your doctor and explain that you have been doing research on the drug and wonder why he has put you on it? Then explain your side (bring articles from the web or the book if you can) and ask him to discuss what you together can do to help get your diabetes under control. Betsie"