[A case of cilostazol-induced pneumonitis]

A 73-year-old man had been treated with cilostazol for antithrombotic therapy after a myocardial infarction. Seventy days after the start of cilostazol therapy, he developed dyspnea, dry cough, and fever. He was admitted to our hospital on April 13, 1923. Chest radiography and CT revealed a ground glass appearance. All drugs except isosorbide dinitrate were discontinued and he was treated with steroids under the presumptive diagnosis of drug-induced pneumonitis. Steroid therapy was effective. The result of a lymphocyte stimulation test was positive for cilostazol. Based on the above findings, cilostazol-induced pneumonitis was diagnosed. To our knowledge, there have been no previous reports of cilostazol-induced pneumonitis.