Hi, My Mother Has Recently Undergone Diabetic Retinopathy (on 10th

Hi, my mother has recently undergone diabetic retinopathy (on 10th oct 2016 to be specific) and certain tests revealed that she should undergo nephropathy as her kidneys are also being affected and creatinine levels as per the lab test done on 6th oct was 1.89.. i read one of the previous questions to which doctor asked to quit metformin when creatinine level is high. I want to know what medicine should she take in order to control her diabetes and if Telma 40 is good for her to control bp or not?