I have IBS-D. Is Loperamide safe for long-term use?

Question

Hello doctor,

I am 34 and struggling with IBS with diarrhea for two years. My colonoscopy was normal, but stool calprotectin came back at 85, slightly above the range. I get loose stools four to five times daily and sometimes urgency after meals.

Tried Rifaximin course, but symptoms came back after two months. So, I need your opinion on the following -

Should I repeat the antibiotic or try the low FODMAP diet first?
Also, how safe are daily antidiarrheal medicines like loperamide in long-term use?
Is there any specific test to clearly rule out inflammatory bowel disease, so I am not missing something more serious behind these repeat flare-ups?

Kindly help.

Answer 1

Hello,

Welcome to icliniq.com.

I read your query and can understand your concern.

Your situation is quite common among people with irritable bowel syndrome (IBS) with diarrhea, where the colonoscopy appears normal, but symptoms remain troublesome.

A stool calprotectin level of 85 is only slightly above normal and usually not in the range seen with active inflammatory bowel disease, where values are often several hundred or more. Still, it does warrant follow-up with your doctor to be certain. Regarding management, a repeat course of Rifaximin can sometimes be effective, but its benefit is usually temporary, and many patients experience recurrence.

A low FODMAP (fermentable oligosaccharides, disaccharides, monosaccharides, and polyols) diet, ideally supervised by a dietitian, has strong evidence of reducing bloating, urgency, and loose stools in IBS and may provide longer-term benefit than antibiotics alone.

Daily antidiarrheal agents such as Loperamide can be used safely for symptom control, provided the dose is not excessive and they are taken under medical guidance, as they mainly slow bowel motility without addressing the underlying gut sensitivity.

To completely rule out inflammatory bowel disease (IBD), your normal colonoscopy along with only mildly elevated calprotectin is already reassuring, but if there are persistent doubts, repeating calprotectin over time or checking additional tests such as CRP (C-reactive protein) or small bowel imaging may help.

Close monitoring of symptoms and nutritional status and periodic re-evaluation by your gastroenterologist will ensure that nothing more serious is missed while allowing you to focus on lifestyle and dietary strategies to keep IBS under control.

I hope this helps.

Thank you and take care.

Regards.