C.W.
I took metformin (Glucophage) for about two years, but I had to stop because the side effects were so bad. I have PCOS, which is an ovarian and hormonal problem. The side effect I had the most trouble with was the frequent loose stools. It seemed like every time I ate I had to go to the bathroom. The medication also caused a lot of gas, and it caused me to gain a lot of weight. I don't know why it does that, but I gained up to 240 while I was on it. After I started college, I lost down to 186. But I would never want to be on metformin again. Even though it was supposed to help my PCOS, the only thing I saw was an increase in bowel movements, gas, nausea, and weight gain. I still had the symptoms of irregular menstrual cycles, sometimes going two months without one, sometimes having one two weeks after the last had started.
I hope the medication works better for you than it did for me. I am glad to be off it though.