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The proportion of atomized droplets containing suspended drug particles for formulations with 0.1 to 1% (w/w) drug for a HFA-134a formulation containing 8% (w/w) ethanol. Three different sizes of initial droplet sizes were evaluated: 9.1, 10.7, and 12.3 μm (GSD of 1.8). The MMAD of the suspended micronized drug is 2.5 μm (GSD of 2.0). No other excipients were included in the simulated formulation
