Sweet Poison, Susie has given you a lot of information about
procedures so if you have any questions or concerns, then you can bring them up to your mom's doctor. Along with the medication questions! Yes, metformin and glucophage are the same drug, so if I were you, I would also have the complete list of the meds your mom takes and go over them one by one with her doctor. It's possible that different doctors prescribed these and didn't know what else she was taking at the time.
Please keep us updated and best of luck!