My WebMD Sign In, Sign Up

Ask Your Question

WebMD Answers

120 Characters remaining
120 Characters remaining
  • First, try and keep your question as short as possible.
  • Include specific words that will help us identify questions that may already have your answer.
  • If you don't find your answer, you can post your question to WebMD Experts and Contributors.


Posted: | Report This Report Question |

What is collagenous colitis?

Related Topics: Colitis

Answers From Experts & Organizations (1)

5,093 Answers
267,354 Helpful Votes

Collagenous colitis is a type of inflammatory bowel disease of the colon. On sigmoidoscopy or colonoscopy the bowel lining appears to be normal but microscopic examination of biopsies shows inflammation. The cause is unclear. The primary symptom of collagenous colitis is a non-bloody, watery diarrhea, but there also may be abdominal pain. The usual tests for diagnosing the cause of diarrhea are normal, and the diagnosis is made with the microscopic exam of colonic biopsies. The disease may last for years, and may subside with or without treatment.

In some patients, smoking cigarettes or taking medications such as NSAIDs may cause the collagenous colitis.

The treatment of microscopic colitis has not been standardized because there have not been adequate large scale, prospective, placebo controlled treatment trials. The following strategies are safe and may relieve diarrhea in some patients:

  • Avoid NSAIDs and cigarettes.
  • Trial of lactose elimination (just to eliminate the possibility that intolerance to lactose in milk is aggravating the diarrhea).
  • Anti-diarrhea agents such as Imodium or Lomotil.
  • Bismuth subsalicylate such as Pepto-Bismol.
  • 5-ASA (mesalamine) compounds such as Asacol, Pentasa, or Colazal.
  • Two studies have showed that budesonide (Entocort) is effective in controlling diarrhea in more than 75% of the patients with collagenous colitis, but the diarrhea tends to recur soon after stopping Entocort.

Although data is lacking, some doctors may consider using medications that potently suppress the immune system such as azathioprine and 6-mercaptopurine among patients with severe microscopic colitis that is unresponsive to other treatments.

This answer should not be considered medical advice...down arrowThis answer should not be considered medical advice and should not take the place of a doctor’s visit. Please see the bottom of the page for more information or visit our Terms and Conditions.up arrow

| Report This Report Answer
Archived: March 20, 2014

Was this helpful?


Thanks for your feedback.

145 of 155 found this helpful
Read the Original Article: Collagenous colitis, what is it?