Abstract
The aerodynamic diameter of pharmaceutical aerosols is the main factor governing their deposition in the human respiratory tract. Particle size of the pharmaceutical aerosols is characterized by liquid impingers and Andersen Cascade Impactors. The present study was aimed at comparing two metered dose inhaler formulation containing formoterol fumarate (6 μg) and budesonide (200 μg). These two formulations were evaluated by using Twin Stage Impinger and Andersen Cascade Impactor. Study revealed that developed metered dose inhaler I formulation of the formoterol fumarate and budesonide had lower mass median aerodynamic diameter and higher fine particle fraction than marketed formulation.
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