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Dry powder inhalers

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Dry powder inhalers are convenient and compact.

The inspiratory airflow disperses the powder. Requires a relatively rapid rate of inhalation to release the drug; therefore, variations in inspiratory effort markedly affect the efficiency of drug delivery to the lungs (1).

The necessity for coordination between actuation and inhalation is less when compared to pMDI (1).

A metered dose inhaler with a spacer is the preferred method of administering high-dose inhaled corticosteroids.

Reference:

  1. Dolovich MB et al. Device selection and outcomes of aerosol therapy: Evidence-based guidelines: American College of Chest Physicians/American College of Asthma, Allergy, and Immunology. Chest. 2005;127(1):335-71.

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