When I was IBS-D, I first used Immodium, then switched to Saccharomyces boulardii. S. boulardii is a yeast probiotic that's been used for decades to treat traveler's diarrhea and pediatric diarrhea. It is the active ingredient in Florastor, but I buy a less expensive version in NOW brand S. boulardii. I prefer it over Immodium because it provides these benefits:
Actively stimulates immunity. ...
Survives antibiotics to help maintain gut health. ...
Survives the low pH environment in the stomach. ...
Does not permanently colonize the gut. ...
Helps digestion and nutrient absorption.
Whenever I was going to be away from home for a long period, I'd constipated myself with this and it saved me 😀 Hope you find some relief that works for you very soon. In solidarity, Kim.