Hi I have been on glumetza now for 2 weeks and was wondering if anyone has experienced what I am feeling. 3 days after starting this medication I began to have pain in my back on my right side by my kidney area. The pain has now come around to the front right below my ribcage. Ican only describe the pain as a constant dull ache kinda feeling like I was kicked in tge stomache. I have recently had and endoscope but didnt think it would be related to that. Any input would be great I have now scared myself reading about lactic acidosos when on this medication. Please let me know anyone! ## Have you consulted your doctor? Glumetza contains the active ingredient Metformin, which is an oral antidiabetic medication and it can cause some stomach pain and gas, as a side effect, but it really soun...