I have the same exact issue as you. I had mine in 2008. I can't even take powders or anything because it goes right through and even causes my system to push through too quickly. I have to order all my medications in liquid form. I have been having issues with Fibromyalgia, as well, so my problems are a lot worse. I have food itolerances such as gluten, wheat, lactose, dairy. My doctor who performed my surgery said that it was possible that my slow transit constipation was caused by food intolerances. But because constipation was not often mentioned when I was younger as a food intolerance issue, I never knew to avoid such things. But unfortunately, for me, even after I did okay for a while avoiding such foods, my G.I. symptoms and diarrhea have gotten worse. Now I have been eating baby food to avoid fiber, as well. It is somewhat working, but I am starting to see that my system is getting used to it and is starting to pull the same stuff as it had before where things would work, than stop. I have been to so many G.I. doctors who found nothing after so many test. Now we think it is a functional issue. Good Luck with everything.
Rectal prolapse surgery Dec. 2006
total colectomy with ileo-rectal anamastosis for slow transit constipation: Aug 7, 2008
Numerous food intolerances
Now struggling with worse stomach, diarrhea issues, which are now uncontrollable.
Diagnosed with Lyme in 2009.
Diagnosed with Fibromyalgia and tremors in 2011