I had an unfortunate bout of diarrhea yesterday which forced me to take a closed look at my stool. I noticed three "pills" in it that we're jellified on the outside and held a slim, hard white pill inside it. The jell was totally intact around the small white pill. After doing some experimenting with the likely culprits based on size and shape, Sun Pharm's generic metformin XR fit the bill exactly. Now, what worries me is it normal for this pill to go clear through my digestive tract without being digested and if so am I getting the proper medication as prescribed: 2 metformin XR500 mg. each twice daily for a total of four pills a day (with three having made it in my one stool)?