Eosinophilic Pneumonia in a Patient With Ulcerative Colitis Treated With Mesalazine: a Case Report
Abstract Background: Mesalazine, also known as mesalamine or 5-ASA, is considered a safe drug and thus widely prescribed for Inflammatory bowel disease (IBD) patients. Mesalazine was previously recognized as a drug that can rarely cause pneumonia because lacking a sulfa component. Nevertheless, although still a rare complication, more and more cases have been reported nowadays. Case presentation: We describe the case of eosinophilic pneumonia (EP) in a 39-year-old woman with ulcerative colitis during treatment with mesalazine. We discontinued mesalazine after drug-induced EP was identified, and she made a prompt recovery.Conclusions: The diagnosis of EP is readily missed due to the rarity and the pulmonary complications of IBD. Since the treatment of pulmonary complications of IBD and EP varies, it is crucial to differentiate them. A prompt recovery can be expected in patients with EP after discontinuing the causative drug.