Proair HFA (albuterol sulfate) Inhalation Aerosol is supplied ... sulfate from the actuator mouthpiece (equivalent to 90 mcg of albuterol base). Asthma may deteriorate acutely over a period ...

The leak rates for the Proventil HFA test and control MDIs were ... per actuation for both MDIs is 108 µg of albuterol sulfate, which corresponds to 90 µg of albuterol base.