35 yr old diabetic. A1c 7.7 Taking 100mg Januvia. Couldn't handle metformin er. Dr. trying brand name Glumetza saying it is easier on stomach. Why?

Try it. Glumetza is an excellent drug. It is a modified release drug that uses advanced polymer delivery technology to slowly release the drug over a long period of time. The slow release action decreases the side effects typically seen with normal metformin.