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CompletedNCT00952952Updated May 24, 2011

Trial of Mesalamine for the Treatment of Active Microscopic Colitis

A Phase 2/3 interventional study of Mesalamine in Microscopic Colitis and Diarrhea, sponsored by Mayo Clinic. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2011-05-24.

Sponsored by Mayo Clinic · Phase 2/3, Interventional, and Treatment

Phase
Phase 2/3
Study type
Interventional
Enrollment
70
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

Subjects must be 18 years old and older, have diarrhea and microscopic colitis. Pregnant or nursing females are excluded. They can't have other untreated diarrheal conditions. Subjects will receive medication for 8 weeks, followed by sigmoidoscopy with biopsies. The subjects will be monitored weekly. A pathologist will review pre and post treatment biopsies. Subjects that show improvement will be followed for 4 weeks post medication.

Read the detailed description

We propose a prospective, randomized trial of mesalamine at 1.2g and 4.8g doses for the treatment of microscopic colitis. Our hypothesis is mesalamine is safe and effective for the treatment of diarrhea in microscopic colitis and that the 4.8g dose is more effective than the 1.2g dose.

We will recruit 70 subjects. The subjects will be randomized into to two groups, 4.8g dose, and 1.2g dose groups. Subjects will receive medication for 8 weeks, followed by sigmoidoscopy with biopsies. The subjects will be monitored weekly. A pathologist will review pre and post treatment biopsies. Responders will be followed for 4 weeks post medication.

Subjects must be 18 years old and older, have diarrhea and microscopic colitis. Subjects will be excluded if they have unsuccessful treatment or side effects to 5-ASA drugs, oral corticosteroids, or salicylate. and antibiotics, mesalamine, bismuth or steroid use in the last two weeks. Subjects may not be on anticholinergics, cholestyramine, digoxin. Pregnant or nursing females are excluded. They can't have other untreated diarrheal conditions.

A two-sample z-score test for proportions will be used to test whether relief rates are different between groups.

02

Conditions studied

  • Microscopic Colitis
  • Diarrhea
03

In context

Colitis, Microscopic

23 studies on the registry are indexed under Colitis, Microscopic; 6 are open to participants now.

This study's enrollment of 70 is above the median of 47 across 14 interventional studies indexed under Colitis, Microscopic.

Browse Colitis, Microscopic studies →

Lead sponsor

Mayo Clinic is the lead sponsor of 3,269 studies on the registry; 672 are open to participants now.

Of its 452 completed or terminated interventional studies of FDA-regulated products, 321 (71%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Subjects must be 18 years old and older.
  • Have diarrhea and microscopic colitis.
  • They need to have a colon done at the Mayo Clinic in Rochester, MN within a year of enrollment.

Exclusion criteria

Exclusion Criteria:

  • None.
Terms in these criteria, in plain language(1)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

05

Study design

Phase
Phase 2 / Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double
Enrollment
70 participants (actual)

Interventions

06

What researchers measure

Primary outcomes

  1. To determine the efficacy of mesalamine at 1.2g and 4.8g doses in microscopic colitis for providing relief of diarrhea

Secondary outcomes

  1. To compare the safety and tolerability of mesalamine at 1.2g and 4.8g doses in patients with microscopic colitis.

07

Study locations

1 site
  • Mayo Clinic
    Rochester, Minnesota 55905, United States
08

Timeline

Tracking since Sep 25, 2026
Not marked actual or estimatedDates not marked actual or estimated

The record gives a start of Feb 2007, a primary completion of Nov 2007 and a completion of Nov 2007. It does not say whether these dates are actual or estimated.

How these figures are worked out, and which studies are left out of them.

Registered
Aug 4, 2009
First posted
Aug 6, 2009
Start
Feb 2007
Primary completionActual
Nov 2007
CompletionActual
Nov 2007
Last update
May 24, 2011
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on May 24, 2011, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT00952952
Lead sponsor
Mayo Clinic
Collaborators
Paul E. Evans MD, William J. Sandborn MD, Edward V. Loftus MD, Thomas C. Smryk MD, Willaim Tremaine MD
First posted
Aug 6, 2009
Start date
Feb 2007
Primary completion
Nov 2007
Completion
Nov 2007
Last update
May 24, 2011
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2011. You cannot join it, but the record below documents what was studied.

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Studies of the drug tested here: Mesalamine

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