We sought to compare the in vitro drug delivery characteristics, delivered dose uniformity, mass median aerodynamic diameter (MMAD) and geometric standard deviation (GSD) of two budesonide/formoterol multidose dry powder inhalers, Bufomix Easyhaler ® (Orion Corporation Orion Pharma) and Symbicort ® Turbuhaler ® (Astra Zeneca) at different patient air flow rates.
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