I am experiencing pretty bad constipation caused by prescriptions opioids I have to take for pain. Is it all right to take FiberCon and Colace (stool softener version only) at the same time, or will their modes of functioning cancel each other out? I take two tabs of Fibercon three times a day (each one contains 625 mg of calcium polycarbophil equivalent to 500 mg polycarbophil (bulk-forming laxative), and have had to add 300 mg a night of Colace. It had worked well, but now it takes several days to work and the first day the stools are hard and passing causes discomfort; normal stools don't appear until the 2nd and 3rd days and then the whole cycle begins again. What else can I take that will improve this situation? Thanks.