Bronchial hyperreactivity induced by angiotensin converting enzyme inhibitor.

Cough is a recognised side effect of angiotensin converting enzyme (ACE) inhibitors although its exact mechanism is still unknown. Reports on the side effect of ACE inhibitors on asthma have been conflicting. These drugs either had no effect on bronchial reactivity or resulted in an increase in pre-existing hyperreactivity. We report a case of a non-asthmatic patient who had lisinopril-induced cough and bronchial hyperreactivity.