The manufacturers' reported dose per actuation for both MDIs is 108 µg of albuterol sulfate, which corresponds to 90 µg of albuterol base ... the performance of the inhalers when not allowed ...

Proair HFA (albuterol sulfate) Inhalation Aerosol ... canister valve and 108 mcg of albuterol sulfate from the actuator mouthpiece (equivalent to 90 mcg of albuterol base). Asthma may deteriorate ...