I started with Metamucil as recommended, and although (combined with more water than I normally drank) it worked well for what it was supposed to, I had a severe allergic reaction. As far as I can tell, I'm allergic to Psyllium Fiber. I broke out in full body hives (everywhere but my head). After 1-2 days of stopping the Metamucil, the symptoms resolved.

I then tried Citrucel with the active ingredient of "Methylcellulose", which as far as I could tell did nothing to help with the pain during BM's. I used it about a week or two.

I've now changed to Benefiber and after a few days it seems to be working but I'm not positive yet. They recently changed the active ingredient to Wheat Dextrin.

Anyone have any words of experience/advice on this?