We studied the clinical features of minocycline-induced pneumonitis in
seven patients. Acute symptoms included fever, dry cough and dyspnea,
indicating acute respiratory failure. Diffuse ground glass shadows wi
th Kerley's B lines, bronchial wall thickening, swelling of vascular b
undles and pleural effusion were visible on radiography. Bronchoalveol
ar lavage or transbronchial lung biopsy confirmed pulmonary eosinophil
ia. Cessation of minocycline led to rapid remission with no treatment
or only short-term steroid therapy. The lymphocyte stimulation test fo
r minocycline with peripheral blood lymphocytes was not found to be us
eful for diagnosis.