[Interstitial pneumonia related to mesalamine]. / Pneumopathie interstitielle induite par la mésalazine.

We report the case of a 57-year-old woman with ulcerative colitis since eight years who developed a diffuse interstitial pneumonia linked to mesalazine (oral and enemas). The adverse drug-related effect to mesalazine was strongly suggested regarding improvement upon discontinuation and relapse after reinstitution of mesalazine. To date, after 8 years, the patient has not any respiratory symptom which is another argument for the adverse drug-related effect to mesalazine.