The effect of an angiotensin converting enzyme inhibitor, ramipril, on bronchial responses to inhaled histamine and bradykinin in asthmatic subjects.

The effect of a potent inhibitor of angiotensin‐converting enzyme, ramipril, was studied on both inhaled histamine and bradykinin‐induced bronchoconstriction in six male, normotensive, mild asthmatic subjects. Oral administration of 10 mg ramipril caused no change in lung function or airway reactivity to inhaled histamine or bradykinin despite achieving adequate reduction in angiotensin‐converting enzyme activity.