I have asthma, went to er 5 hours ago where they gave me 2 doses of albuterol neb treatments. my heart is still racing at 120's, when should it slow?

Albuterol: The tachycardia related to two albuterol treatments would likely last four to six hours.

Heart racing: It will likely take several hours for your heart rate to return to normal. In addition to the stress of your asthma exacerbation, the albuterol you were given causes increased heart rate, so try to relax and keep your asthma under control.