Di Paolo 1 determined that Ventolin Evohalers can be weighed to determine how much medication remains; as the 200 doses are used, the canister’s weight falls from 29 g to 15 g. We investigated if ...

Three Proventil HFA and three Ventolin HFA MDIs ... but the emitted-particle size, dose per actuation, respirable mass, and nonrespirable mass were unaffected. The inhalers tested at temperatures ...

Seven Proventil HFA (albuterol sulfate 6.7 g hydrofluoroalkane inhalation aerosol) a and seven Ventolin HFA (albuterol ... for direct aerodynamic particle-size measurement.7 Myrdal et al.