After reading some reports here, I decided to try Metamucil again for LAR syndrome. It's not a miracle, but it did provide some help. My primary complaint is long BM times and it didn't do much for that. But it seems to have reduced the number of times per day from three down to two. It also increased the caliber of the stools and usually reduces the fragmentation by a small amount, maybe ten percent. It also improved the stool consistency, so that I hardly have any more rectal bleeding. Hemorrhoid irritation is also reduced significantly. I can also eat foods that I used to have enough of a sensitivity to that I avoided them in the past. I can eat strawberries now! Also beans and I can tolerate more spices.
I take about 1 level tablespoon after breakfast and dinner. It can be mixed with fruit juice or a little Tang to improve flavor. Metamucil has a "smooth" version that's finely ground and it works the best for me. Nutrition centers at Kroger and other major market chains also have a powdered psyllium seed product in the bulk section that costs less and is the same thing. The whole seed didn't work for me; it was too scratchy. Stick with the powder.
The dosing is a bit of an art. I mix the powder with about six ounces of water at the end of the meal. I found that drinking a large amount of fluid during the meal would intensify the effect and make it more of a laxative, almost emptying the colon in the middle of the night if I had a lot of liquids at dinner. If I need a lot of fluid due to hot weather or exercise, I reduce the dose about half and it helps. If I'm eating out, I take a small container to the restaurant and mix it up in the water glass.
When first starting it, I had some gas and the effect was less predictable. There was some minor pain at BM time and I think it was partly from stretching of the neorectum area as the stool caliber increased. That's gone away now. But after finding the right dose and sticking with it, the results are worth it and I've been using it about three months now. So if you're starting it and it's not working right, keep it up and try reducing the dose until it's tolerated and producing some benefit. From there, tinker with the dose, water amount, and timing to see what works best.