Pseudomembranous colitis. A complication of sulfasalazine therapy in a patient with Crohn's colitis
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Updated: Oct 7, 2026

Murine Colitis Modeling using Dextran Sulfate Sodium (DSS)
Published on: January 20, 2010
Abstract:
Pseudomembranous colitis is a potentially life-threatening acute medical problem usually associated with a history of previous antibiotic exposure. Presented here is a case of sulfasalazine associated pseudomembranous colitis in a patient with known Crohn's colitis. The diagnosis was confirmed by identifying Clostridium difficile toxin in the stool. This a newly reported complication of sulfasalazine therapy.
Insights
Sulfasalazine can cause a severe condition called pseudomembranous colitis, even in patients with Crohn's disease. This rare complication, confirmed by detecting Clostridium difficile toxin, is a new finding for sulfasalazine therapy.
Area of Science:
- Gastroenterology
- Infectious Diseases
- Pharmacology
Background:
- Pseudomembranous colitis is a severe gastrointestinal condition often linked to prior antibiotic use.
- Inflammatory bowel disease (IBD) management frequently involves medications like sulfasalazine.
- Crohn's disease is a chronic inflammatory condition of the digestive tract.
Observation:
- A patient with established Crohn's colitis developed pseudomembranous colitis.
- The patient had a history of sulfasalazine therapy.
Findings:
- Clostridium difficile toxin was identified in the patient's stool, confirming the diagnosis.
- This case represents a newly identified complication of sulfasalazine treatment.
Implications:
- Clinicians should consider sulfasalazine as a potential cause of pseudomembranous colitis, particularly in IBD patients.
- This finding expands the known adverse effects of sulfasalazine.
- Further investigation into the mechanisms of drug-induced C. difficile infection is warranted.
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