G M Two and a half weeks ago I was put on Metformin 1 x 500 per day but after 8 days I had to stop them (bathroom 6 or 7 times a day) I spoke to my DN who arranged a prescription for SR ,what a dramatic difference its the COMPLETE OPPOSITE, tomorrow is the last day of the 6 week "X Pert " course at my Drs Surgery so I will have a word with the DN ,does Metformin and the SR version have the same effect on other people??