A device for delivering medications with hydroflouroalkane propellant driven metered-dose inhalers (MDIs). The device includes a collapsible bag to which is attached a bidirectional mouthpiece and an adaptor that receives the MDI. The mouthpiece contains a reed that functions as an audible signal and a screen to prevent inhalation of unwanted particles. When the MDI is triggered it discharges the medication into the collapsible bag which is then inhaled by the user through the mouthpiece. This collapses the bag. The reed emits an audible sound if the user inhales above a predetermined flow rate to maximize medication delivery and ensure dose-to-dose consistency.
