When I saw that researchers acknowledged the number of potential ...

When I saw that researchers acknowledged the number of potential gene variants that are involved in determining the efficacy of montelukast and then I am reading the reports of the side effects, I am wondering why montelukast was ever approved for seasonal allergies. Asthma is potentially life threatening. But why take Singulair -montelukast for annoying allergies that won't kill you. ---------------------------------------------------------------------------------------------------------------- " However, logically one might predict that it will be the combination of the polymorphisms in these different key regulatory enzymes and receptors that may ultimately determine treatment response. There have been some attempts to tease out the possible contribution of different genes important in this pathway for treatment response to a Cys leukotriene receptor 1 antagonist.18 However, because of the number of potential gene variants that may contribute to efficacy, large studies will be needed to fully evaluate the potential contribution of pharmacogenetic variability in this pathway to treatment response to Cys leukotriene receptor 1 antagonists. Work in the cardiovascular field has demonstrated the potential importance of genetic variants in this pathway to disease risk and also to treatment response,19 suggesting the potential for important effects to be defined in asthma." (Chest. 2006;130:1873-1878.) © 2006 American College of Chest Physicians Pharmacogenetics of Asthma Ian P. Hall, DM * From the Division of Therapeutics and Molecular Medicine, University Hospital of Nottingham, Nottingham, UK. Correspondence to: Ian P. Hall, DM, Division of Therapeutics and Molecular Medicine, University Hospital of Nottingham, Nottingham NG7 2UH, UK; e-mail: Ian.Hall@nottingham.ac.uk http://www.chestjournal.org/cgi/content/full/130/6/1873 .