I got no help figuring it out 30+ years ago, but it is IBS with constipation as far as i am concerned. They did a study where i swallowed markers and said i have slow transit time. There was one drug many years ago that helped some but they took it off the market.Oh, boy. I have pretty bad CRS right now (pun intended, too). Do you have IBS with constipation? Suspected and being confirmed?
Linzess isn't a bowel prep for a colonoscopy, but I'm not sure what the question is. Have you tried fiber (capsules, tablets or powder) and polyethylene glycol (miralax) as well as lactulose? How often are the symptoms happening?
I just happen to be drinking colon prep stuff tonight.