The propellant-leak rate of the test MDIs was compared with that of the controls (Figure 3). The leak rates for the Proventil HFA test and control MDIs were similar at the start of testing and at ...

HFA-based metered-dose inhalers (MDIs) contain a propellant to deliver the medication that will continue to spray even after the medication has run out. Therefore, when the medication is gone from ...

According to a 2019 WHO report, a typical inhaler containing the propellant HFA-134a has a carbon footprint equivalent to a 180-mile car journey. [File, Standard] In the heart of Nairobi ...