Clinical Research Details Clinical Research Researching Precision Emergency Asthma Treatment (RePEAT): Pharmacogenomics of Bronchodilator Response Study Description The purpose of this study is to study how your genes are associated with your asthma attack. Inclusion/Exclusion Criteria Inclusion criteria: Age 2-18 years Prior diagnosis of asthma OR ED physician confirms this is an asthma exacerbation For ages 2-17 years: LAR present at bedside for consent Exclusion criteria: Cystic fibrosis or bronchopulmonary dysplasia In law enforcement custody or wards of the state (i.e., DCF custody) Known pregnancy Critically ill (ESI triage level 1) Intubated , on BiPAP, on CPAP, bag valve mask ventilation (“getting bagged”) Investigators Jennifer N. Fishe, M.D. Emergency Medicine