Aerosol Deposition of Inhaled Corticosteroids/Long-Acting β2-Agonists in the Peripheral Airways of Patients with Asthma Using Functional Respiratory Imaging, a Novel Imaging Technology

Introduction Drug deposition in the peripheral airways has been reported to differ between pressurized metered dose inhalers (pMDIs) and dry powder inhalers (DPIs). This study was conducted to determine the drug deposition fraction from three inhaled corticosteroids/long-acting β2-agonists (ICS/LABA) combination products for inhalation in the peripheral airways.