Sulfasalazine pneumonitis.

A man with alleged Crohn's disease of the terminal ileum was started on sulfasalazine. Five weeks later he developed progressive cough, shortness of breath, and fever associated with peripheral eosinophilia and bilateral pulmonary infiltrates. After withdrawal of sulfasalazine all abnormalities returned to normal. This case supports the conviction that there is an entity of sulfasalazine-induced lung disease.