My situation might be a bit different. I am not AT ALL allowed to take a stimulating laxative. Colace and Miralax will help BUT it causes my IBS to flare. Soooo....I think Dahlek hit the nail on the head. The REAL key is water and LOTS of it. I was taking Nexium, do take Vicodin and also take Klonopin. All 3 are constipating. ALL of my docs have said fiber and water. However, you have to expirement to find the right amount. At first I did take Miralax and it straightened me out but my Urogyn did NOT want me on it for very long (female issues as well as IBS). But then I switched right over to Benefiber and again, a LOT of water. All I need now is 1/8 of a tsp. and I am good to go...regularly...every morning like clockwork.