The effect of sodium cromoglycate in preventing aspirin induced bronchospasm

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Abstract
Patients (17) with aspirin-induced asthma were studied, the majority being intolerant to more than 1 analgesic. In addition to asthma, 11 patients had sinusitis and 8 had nasal polyps. Serum IgE[immunoglobulin E] levels were normal with a mean of 295 iu/ml. Some patients had positive cutaneous and PK [Prausnity-Kuestner] tests against inhalants and non-analgesic drugs. Spirometry showed the bronchial obstruction to be mild. All patients were hyper-reactive to acetylcholine. Oral provocation tests with aspirin alone and also with the prior administration of sodium cromoglycate (SCG) by inhalation were performed and the results assessed by spirometry and clinical examination. The obstruction is probably due to edema of the bronchial mucosa together with pulmonary congestion rather than a simple spasm of the bronchi. SCG significantly prevented the ventilatory obstruction induced by aspirin. Non-immunological factors possibly are responsible for the asthma and that SCG may have an effect on the altered receptors protecting them from the action of aspirin on kinins.