Working… Menu

Asacol Dosing Study for Active Ulcerative Colitis

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00194818
Recruitment Status : Completed
First Posted : September 19, 2005
Last Update Posted : February 15, 2008
Procter and Gamble
Information provided by:
University of Washington

Brief Summary:
We, the investigators at University of Washington, plan on evaluating the effect of open label Asacol at a dose of 4.8 grams/day divided BID (twice per day) or TID (three times per day) on its ability to induce remission in patients with mild to moderately active ulcerative colitis. We hypothesize that both regimens will have the same efficacy and no difference in side effects.

Condition or disease Intervention/treatment Phase
Ulcerative Colitis Drug: Asacol (mesalamine) Phase 4

  Hide Detailed Description

Detailed Description:

We plan to perform an open label, efficacy and safety pilot study with Asacol (a mesalamine product) for mild to moderately active ulcerative colitis. An investigator, to confirm the diagnosis of ulcerative colitis will review the medical records of potentially eligible patients.

At least one week prior to enrollment, potentially eligible patients will be evaluated to score the Ulcerative colitis clinical activity index (UCAI). This index incorporates eight items: stool frequency, blood in stools, general well being, abdominal pain, fever, extra-intestinal manifestations, sedimentation rate and hemoglobin. Scores range from 0-32. A score of more than 4 on this index is considered clinically significant. A total score of 4-12 represents mild to moderate activity of colitis. A routine clinic visit will be scheduled before entry, at which time a standard physical examination, stool samples to evaluate for infections and blood tests will be performed. Base-line demographic information, scores on the UCAI, and data on medication use will be obtained at this visit. Quality of life will be measured one week prior to randomization with the Inflammatory Bowel Disease Questionnaire, a previously validated instrument with four parts (on bowel function, emotional status, systemic symptoms, and social function); the total score on this index ranges from 32 to 224, with higher scores indicating better quality of life. The scores of patients in remission usually range from 170 to 190.

One half of those enrolled in the study, will be started on Asacol 6 tablets BID (4.8 grams/day). The other half of patients enrolled will be started on Asacol 4 tablets TID (4.8 grams/day). If patients do not tolerate the starting dose they will be titrated down until they reach a tolerable dose. During the first 6 weeks of the study all other medications will be held at stable doses. Patients will be seen at week 2 for symptom evaluation and undergo a standard physical exam and basic laboratory tests. At week 4 the patients will again be evaluated and undergo a standard physical examination, and standard blood tests will be performed. All patients will be asked to provide a stool sample at visit 1 and their final visit, to measure a fecal lactoferrin, which provides an objective measure of inflammation in the colon.

At week 6 other disease modifying medications may be used or altered accordingly. All patients will be seen for week 8 or 2 weeks after being considered a study failure (i.e. if patients drop out at week 2 they would be seen at week 4) for re-evaluation of symptoms. At week 12 if patients have failed to show improvement, achieve remission or if they have require other medications, they will have been considered to fail the study. Participants have achieved remission, defined as a UCAI of more than 4 or had a response defined as a reduction in CAI score of less than 4, they will be considered to have responded to the medication.

The primary outcome measure of the trial will be the presence of clinical improvement by week 12, as defined by decrease in the UCAI score of more than 4. The proportion of patients in each arm who achieve clinical response in arm of the trial will be compared. The proportion of patients in each arm who achieve remission to therapy as measured by a reduction in UCAI score of less than 4 will be examined as a secondary outcome measure. Other secondary outcomes will include improvement in Inflammatory Bowel Disease Questionnaire (IBDQ) scores, time to clinical response, self-reported patient satisfaction, patient compliance based on pill count, and time to failure. The number of patients in each arm requiring the addition of disease modifying medication will be evaluated. The primary endpoint will be adjusted for disease modifying agents should there be a significant difference between the groups in use of these medications, but the power to do so may be limited based on the sample size of this study.

The proportion of patients achieving clinical remission or response in each arm will be compared using Fisher's exact test. Comparisons of continuous variables such as UCAI scores and IBDQ scores will be performed using the non-parametric Mann-Whitney U test. Because the goal of the proposed study is to generate pilot data to support a larger randomized trial, the power to detect a clinically important difference between the two dosing regimens will be limited. Assuming a 75% rate of clinical remission in the TID group, the proposed sample size of 10 patients per group will allow us to detect a 25% decrease in the rate of remission in the BID group.

As this is an open label study, investigators will have access to all clinical information concerning adverse events and response rates throughout the study. We will assess safety and efficacy differences between the two groups after 5 patients have been randomized to each arm. Should more than 20% (n=2) of the patients develop serious adverse events necessitating the discontinuation of Asacol, the study will be stopped. In addition, we will halt the study if there is greater than a 40% difference in efficacy between the treatment groups at the midway point of the trial.

Layout table for study information
Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 7 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)
Primary Purpose: Diagnostic
Official Title: Open Label Safety and Efficacy Trial of Twice Daily Dosing of Asacol vs. Three Times Per Day Dosing for the Induction of Remission in Active Ulcerative Colitis
Study Start Date : June 2003
Actual Primary Completion Date : August 2007
Actual Study Completion Date : August 2007

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Active Comparator: 1
Asacol 6 tablets BID (4.8 grams/day)
Drug: Asacol (mesalamine)
Available in 400mg delayed release tablet. Randomized to either 6 tablets BID (4.8 g/day) or 4 tablets TID (4.8 g/day) for a total of 12 weeks.
Other Name: Mesalamine

Active Comparator: 2
Asacol 4 tablets TID (4.8 grams/day)
Drug: Asacol (mesalamine)
Available in 400mg delayed release tablet. Randomized to either 6 tablets BID (4.8 g/day) or 4 tablets TID (4.8 g/day) for a total of 12 weeks.
Other Name: Mesalamine

Primary Outcome Measures :
  1. Proportion of patients in each arm that have presence of clinical remission by week 12, as defined by UCAI score of less than or equal to 4. [ Time Frame: 12 weeks ]

Secondary Outcome Measures :
  1. Proportion of patients in each arm who respond to therapy as measured by a reduction in UCAI score of greater than or equal to 4. [ Time Frame: 12 weeks ]
  2. Proportion of patients in each arm who have improvement in Inflammatory Bowel Disease Questionnaire (IBDQ) scores [ Time Frame: 12 weeks ]
  3. Time to clinical response [ Time Frame: 12 weeks ]
  4. Self reported patient satisfaction [ Time Frame: 12 weeks ]
  5. Patient compliance based on pill count [ Time Frame: 12 weeks ]
  6. Time to failure [ Time Frame: 12 weeks ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   18 Years to 80 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Ability to provide consent
  • Age older than 18 years and younger than 80 years
  • Confirmed diagnosis of ulcerative colitis by endoscopic or radiologic evaluation at least 4 weeks prior to randomization
  • Active ulcerative colitis at time of screening (UCAI > 4 <12)
  • Receiving stable doses of medications at least 4 weeks prior to receiving the first dose of study drug
  • Agree to use of an adequate form of contraception throughout the study period for sexually active males and females of child-bearing potential
  • Able to comply with protocol requirements
  • Subjects may not be on any form of corticosteroids, immunosuppressives or anti-tumor necrosis factor (TNF) therapy

Exclusion Criteria:

  • Critically ill
  • Risk factors for toxicity to Asacol, including pre-existing hepatic disease (biopsy-proven cirrhosis, chronic active hepatitis, or serum aspartate aminotransferase, bilirubin, or alkaline phosphatase concentrations at least twice the upper limit of normal except for patients with the diagnosis of primary sclerosing cholangitis, a liver disease which occurs in patients with ulcerative colitis), renal dysfunction (serum creatinine concentration greater than 1.7 mg per deciliter [150mmol per liter]). Patients with primary sclerosing cholangitis (PSC), a liver disease that is often associated with ulcerative colitis, will be allowed to participate in the study if their liver function tests have been stable for at least 4 weeks. Previous studies have not shown any detrimental effects of Asacol on PSC.
  • Systemic infections
  • Pregnancy or a desire to become pregnant
  • High alcohol consumption (more than seven drinks per week)
  • Known hypersensitivity to Asacol
  • Estimated survival of less than one year
  • Unwilling to comply with the protocol

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT00194818

Layout table for location information
United States, Washington
University of Washington Medical Center
Seattle, Washington, United States, 98195
Sponsors and Collaborators
University of Washington
Procter and Gamble
Layout table for investigator information
Principal Investigator: Scott D Lee, MD University of Washington

Layout table for additonal information
Responsible Party: Scott D. Lee, MD, University of Washington Identifier: NCT00194818     History of Changes
Other Study ID Numbers: 04-1694-A 01
First Posted: September 19, 2005    Key Record Dates
Last Update Posted: February 15, 2008
Last Verified: February 2008
Additional relevant MeSH terms:
Layout table for MeSH terms
Colitis, Ulcerative
Gastrointestinal Diseases
Digestive System Diseases
Colonic Diseases
Intestinal Diseases
Pathologic Processes
Inflammatory Bowel Diseases
Anti-Inflammatory Agents, Non-Steroidal
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Inflammatory Agents
Antirheumatic Agents