I have had irritable bowel-C for over 40 years. In the last three years and a half years the constipation has become severe. Up until then, I rarely used laxatives (could count on one hand, the # of times) One gastroenterologist recommended the fodmap diet, (so restrictive and I am already restricted as a celiac) metamucil and miralax twice a day. That seemed to alleviate the constipation but all that miralax and metamucil aggravated my irritable bowel. That same gastroenterologist said in his report "her bowel will just have to get used to it": it didn't) In the last three years, I have also gone from being on no medications to three: metoprolol, prolia and repatha (evoculomab injection). One or more of these drugs has made the constipation worse.
Recently, I stopped using Miralax. It no longer seems as effective and was giving me daily lower abdominal cramping to the point where some days it was uncomfortable to walk. So much gas and terrible bloating. (Interesting how all of its advertising says no bloating, no cramping) Then, I tried milk of magnesia and it works but the cramping for me was beyond tolerable. So, a few nights ago, I tried two senokot and that worked without cramping but I'm sure if I use it daily it will be the same issue. Lizness gave me abdominal pain and bloating.
Over the years, I have taken probiotics but didnt see a difference.
My last colonscopy was 9 years ago (CT colonography and sigmoidoscopy about 3 years ago--one nonserious polyp)and it showed a "long and twisty colon".
I am waiting for my gastroenterologist appt next month. Actually beginning to wonder if there is a solution. Prucalopride called Resotran was suggested, (believe that helps with motility). However, I have an arrythmia that is now well-controlled and Health Canada has a warning saying proceed with caution re resotran if you have those problems and the drug safety clinic could not assure me it would be safe. I really do believe it is the medications that have made the IBS-C worse. That's the thing with modern medicine. The drugs fix one problem and often create some new condition (from side effects) that then needs to be treated.