Hi all, I've been diabetic for 10 years. Metaformin really upset me, so the Dr put me on gliclazide, but a new doctor didn't approve of that and has now put me on Januvia sitagliptins. My mmol is between 6.5 and 10, which I think is Ok but have unpleasant side effects. Constipation and stomach cramps and odd twinges which I never had before. Is anyone else on these tablets? and have any odd side effects. I can see no mention of it on any of the forum posts.