Can Aspirin Prevent Asthma?

Daily pill reduced risk of adult-onset disease by 22 percent, study found.

By Serena Gordon
HealthDay Reporter
Monday, January 15, 2007; 12:00 AM

Copyright © 2007 ScoutNews, LLC. All rights reserved.

MONDAY, Jan. 15 (HealthDay News) -- Can taking an aspirin each day stop asthma from developing in adults?

Maybe, suggests new research published in the January issue of the American Journal of Respiratory and Critical Care Medicine that found adult-onset asthma risk was reduced by 22 percent in men who were already taking a daily aspirin for heart-disease prevention.

"Our findings suggest that low-dose aspirin may have beneficial effects on asthma," said study co-author Dr. Tobias Kurth, an assistant professor of medicine and an associate epidemiologist in the division of aging at Brigham and Women's Hospital in Boston.

But, Kurth added, it's too soon to recommend that anyone start using daily aspirin solely for asthma prevention.

As many as 20 million Americans have asthma, according to the American Academy of Allergy, Asthma and Immunology (AAAAI). Despite advances in treatment, about 5,000 people die due to asthma every year in the United States, the AAAAI reports.

The incidence of asthma has been rising in recent years, according to background information in the study. And that rise coincides with the decreased use of aspirin as people have switched to other over-the-counter pain relievers, or avoided aspirin use in children due to concerns about Reyes syndrome. That led some researchers to wonder if the reduction in aspirin use was contributing to the rise of asthma.

To test that hypothesis, Kurth and his colleagues reviewed data from the Physicians' Health Study, which began in 1982. They included data from 22,071 male physicians between the ages of 40 and 84. The physicians were randomly assigned to receive either a daily dose of 325 milligrams of aspirin or a placebo. The original aim of the research was to study aspirin's role in heart-disease prevention.

During the five-year study period, 113 new cases of asthma were diagnosed in the 11,037-member aspirin group, compared with 145 in the placebo group. This represented a 22 percent decrease in the risk of developing asthma for those taking low-dose aspirin.