This review summarizes the effects of beta2-agonists on asthma severity. There has
been a controversy as to whether the regularly scheduled use of beta2-adrenergic agonists
increases the risk of adverse outcomes in asthma. A number of epidemiological and
clinical studies have found an association between the regularly scheduled use of
beta-agonist drugs and increased risk of asthma morbidity and mortality. However,
this observation has not been consistent across studies. We discuss here the potential
mechanisms to explain the relationship between the use of beta-agonists on a regularly
scheduled basis and adverse outcomes of asthma therapy; and we provide a brief review
of the effect of genetic diversity at the beta2-adrenergic receptor locus on asthma
severity. Overall, the evidence suggests that the beta2-agonists in current use in
the United States are generally safe and effective; friends, not foes.
Beta2-adrenergic agonists - receptors - asthma - pharmacological - genetics