So I got a letter form my insurance company a few weeks ago saying that they no longer will cover Glumetza XR and that I would need to switch to Metformin ER. I have had so much success on Glumetza that I actually cried after reading the letter. After taking Metformin (non ER), I was able to conceive despite my PCOS. However, postpartum I tried going back on Metformin (non ER) and didn't have any results re:weight loss despite exercise and diet. So my endo put me on Glumetza and I was able to fight back to a healthy weight only to be told I have to switch meds again!!! I am SOOO scared that I will regain all of my weight back. Anyone make the switch from Glumetza to Metformin ER? How did it affect your weight and periods?