I had side effects from Januvia for a few weeks but it has been fine since. I have been taking metformin for 4 years and although I have become more tolerant of them every now and then I am reminded that they don' like me!
Were you taking metformin previously? I never like the idea of these joint tablets but the combined Januvia and metformin is supposed to be better.
From previous discussions about Januvia others have had side effects with it for a short ime as i did but some have had o discontinue taking it. I don't recall seeing any discussions of Janumet.
I always have side effecs from something new so always give hem a few weeks .trial.