Asthma in children and ASA intolerance.

Intolerance to acetylsalicylic acid (ASA) in asthmatics has been widely studied in the adult population, and to a lesser extent in children. In the present study, we present 16 asthmatics between the ages of 2 and 14 suffering from asthma induced by ASA ingestion, and the clinical characteristics are compared with a population of asthmatic children with a negative challenge test. The following results were obtained: 1) in contrast to in adults, females are not predisposed to ASA intolerance in childhood, the male:female ratio being the usual 2:1 in infantile asthma; 2) ASA intolerance can appear at a very early age (in our series the youngest was 1 year old); 3) extrinsic asthmatics are the most commonly affected, and also children with exercise-induced asthma; 4) in extrinsic asthmatics with asthma attacks precipitated by ASA, sinusitis is more frequent than in extrinsic asthmatics with ASA tolerance; 5) polyposis is exceptional; 6) the presence of associated urticaria is frequent, and much greater than in adult ASA-intolerant asthmatics; and 7) the results of the challenge with NSAIDs are similar to those obtained in adult patients, which would indicate a common pathophysiological mechanism related to the capacity of these drugs to inhibit cyclooxygenase activity.