Take Tylenol and Get Asthma

Acetaminophin, a pain reliever found in Tylenol, may increase the risk of developing asthma.

http://www.ncbi.nlm.nih.gov/pubmed/20709817

From an article published on www.toyourhealth.com:

Study participants were divided into categories based on their self-reported smoking history, classified as never smokers, ex-smokers and current smokers; lifetime cigarette consumption was quantified in pack-years. Then, participants were classified based on their analgesic use as never users; occasional users (1-5 times in the past month); regular users (6-29 times in the past month); and daily users (more than 29 times in the past month).

Results: Among the participants, 6.9% had asthma, 11.8% had COPD, and 2.8% had both diseases. Ultimately, researchers concluded that the "study results are consistent with previous research demonstrating a positive association between acetaminophen use and prevalence of asthma. We also investigated the relation of acetaminophen with the prevalence of COPD and found a significant dose-response relation, which was of about the same magnitude as the association for asthma. Increased use of acetaminophen also was associated with decreased lung function, although this effect was seen only in participants reporting daily (or greater) use of acetaminophen."