It’s different from HFA.
ProAir RespiClick® is breath-activated. So when you’re in the middle of an asthma attack, you don’t have to try and coordinate “pressing and breathing” at the same time.
And ProAir RespiClick® doesn’t need to be primed or shaken, because there is no spray or “plume.” There is no need for washing and no button to press. Do not use a spacer with ProAir RespiClick®.