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Updated: Mar 28, 2026

Pseudomonas aeruginosa Induced Lung Injury Model
Published on: October 29, 2014
[THREE CASES OF DRUG-INDUCED PNEUMONIA CAUSED BY MESALAZINE]
Norimichi Akiyama1, Koshi Yokomura, Tsuyoshi Nozue
1Department of Respiratory Medicine, Seirei Mikatahara Hospital.
Abstract:
We report three cases of drug-induced pneumonia caused by mesalazine. They were all diagnosed as ulcerative colitis and treated with mesalazine orally. Our three cases and literature review revealed that mesalazine-induced pneumonia resemble like eosinophilic pneumonia or organizing pneumonia and that have good prognosis with drug cessation or administration of corticosteroid. The patient of ulcerative colitis is increasing every year and it is anticipated that the patient with mesalazine-induced pneumonia may also increase. In the treatment of ulcerative colitis with mesalazine, we should pay attention with patient's cough or fever for early detection of drug-induced pneumonia.
Insights
Mesalazine can cause drug-induced pneumonia in ulcerative colitis patients. Early detection through monitoring cough or fever is crucial for good prognosis with treatment cessation or corticosteroids.
Area of Science:
- Pulmonology
- Gastroenterology
- Pharmacology
Context:
- Ulcerative colitis is a chronic inflammatory bowel disease.
- Mesalazine is a common oral treatment for ulcerative colitis.
- Drug-induced lung injury is an important consideration in patients on medication.
Purpose:
- To report three cases of mesalazine-induced pneumonia.
- To review the clinical presentation and prognosis of mesalazine-induced pneumonia.
- To raise awareness among clinicians regarding this adverse effect.
Summary:
- Three cases of drug-induced pneumonia secondary to mesalazine treatment for ulcerative colitis are presented.
- Mesalazine-induced pneumonia often mimics eosinophilic pneumonia or organizing pneumonia.
- Prognosis is generally good with drug cessation or corticosteroid therapy.
Impact:
- Highlights the potential for mesalazine to cause pulmonary toxicity.
- Emphasizes the importance of monitoring for respiratory symptoms in patients treated with mesalazine.
- Suggests that early recognition and intervention can lead to favorable outcomes for drug-induced pneumonia.
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