You may have to try several different fiber pills to find one your body likes. Mine likes Citrucel which was the most expensive until generic came out. Look at FiberCon ingredients to see what type of fiber it has so you don't get another with the same fiber.
There are a lot of fiber pills available (guess it a common issue) but many have the same type of fiber so read ingredients and keep track of which ones you tried. Good luck.
edit to add: I re-read your post and you did name the ingredients but I've never heard of calcium polycarbofil. Also when I started fiber pills I started with half a pill not every day which seemed to help my gut adjust. In bad times I took as many as 2 pills 2 to 3 times a day but after things got better it was 1 a day and now none taken.
Post Edited (imagardener2) : 1/21/2017 7:37:00 AM (GMT-7)