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Controlled Assessment of Salicylate and Azathioprine

A randomised, open study of aminosalicylate withdrawal in patients with ulcerative colitis in established remission on combination treatment of azathioprine (or 6-mercaptopurine) and an aminosalicylate

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN99666810
Enrollment
410
Registered
2008-01-30
Start date
2006-02-01
Completion date
Unknown
Last updated
2015-01-13

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ulcerative colitis Digestive System Ulcerative colitis

Interventions

Please note that this study was stopped in 2008 due to poor recruitment. At enrolment patients (already taking azathioprine and a 5-ASA) will have bloods taken and have a sigmoidoscopy to confirm rem

Sponsors

University of Nottingham (UK)
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Male and female patients aged between 18 and 75 years with ulcerative colitis 2. Patients whose ulcerative colitis has been in clinical remission, defined as being off steroids for 3 months or longer 3. Patients taking both azathioprine (or 6-mercaptopurine) and an aminosalicylate 4. Patients taking azathioprine (greater than 50 mg/day) or 6-mercaptopurine (greater than 25 mg/day) at a stable dose for at least 8 weeks 5. Patients taking an aminosalicylate at a stable dose (specified below) for at least 4 weeks: 5.1. Sulphasalazine greater than 1.5 g/day 5.2. Pentasa (slow release mesalazine) greater than 750 mg/day 5.3. Asacol (mesalazine) or generic equivalents greater than 800 mg/day 5.4. Colazide (balsalazide) greater than 2.25 g/day 5.5. Dipentum (olsalazine) greater than 750 mg/day 6. Patients on combined treatment with azathioprine (or 6-MP) and an aminosalicylate for a minimum of 6 months but no more than 4 years without relapse. Patients may enter if they have briefly been off either treatment during this time (e.g., because of abnormal blood test results) but prescription of each drug should cover at least 85% of the period of time for continuous drug treatment to be declared. N.B. Duration of aminosalicylate may be longer. 7. Patients who have given written informed consent

Exclusion criteria

Exclusion criteria: 1. Patients with Crohn?s disease 2. Patients with a baseline Walmsley Simple Activity Index greater than 2 3. Patients with a baseline sigmoidoscopy grade of greater than 2 (Baron Scale) 4. Patients requiring long term treatment with oral steroids for any medical condition 5. Women who are pregnant or lactating 6. Patients with known human immunodeficiency virus (HIV) infection 7. Other serious medical or psychiatric illness currently ongoing, or experienced within the past three months, that in the opinion of the investigator would compromise the study 8. Patients unable to comply with the protocol requirements, including severe alcohol and drug use

Design outcomes

Primary

MeasureTime frame
Relapse rates of azathioprine mono-therapy compared to azathioprine and salicylate dual therapy over the first 12 months.

Secondary

MeasureTime frame
Factors predictive of success of the different treatment regimes.

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026