 Blood will be drawn at baseline. The serum level for albuterol enantiomers requires 7 ml of blood and will only be drawn once. Children can elect to be in just the RCT of the two medications or to take part in both parts of the study. Blood samples will be sent to the lab, spun down and frozen. The samples will be stored there until the study is completed and then shipped to an outside lab for measurement of plasma levels of S and R albuterol. These plasma levels will only be reviewed after patient disposition has already been decided as they are not clinically relevant to their acute management at this time. 