I took XR Metformin (1,000mg) for years w/o issues until the recall issues. I switched to 1,000mg immediate release w/o problems. Fast forward 1 1/2 years and I had to go up to 1,500mg. Initially everything was fine, say for 10 days. My stool became a little softer, and it stayed at the same level for 6 weeks or so. Now, the last few days, it's yet softer again, meaning it's VERY soft. Not yet diarrhea, though, but not too far off. I've experimented with different ways of taking it--2 in the mornin, one at night or one with every meal f.e.--made no difference. I have no other complaints or discomfort. Is this possible with Metformin, that the reaction would be so delayed?