Provocation test coupled with bronchoalveolar lavage in diagnosis of propranolol-induced hypersensitivity pneumonitis.

A 59-yr-old man was given over a 30-month period a cumulative dose of 36 g of propranolol for treatment of angina pectoris. He then presented with respiratory disease, having all the clinical, radiologic, and functional characteristics of interstitial pneumonitis. No other cause of pneumonitis was found.