A device, system and method is provided for dispersing an aerosol formulation comprising a medicament. The device may be useful in administering inhaleable vaccines and the like. The device designed for low cost and applicability to a multitude of patient populations. The device has a spacer (10) is suitable for use with a wide range of aerosolized formulations, particularly powders. The spacer (10) may be an expandable volume spacer (10). The spacer (10) may also be used with other inhalation aids (80). The spacer (10) may include a multi-purpose outlet (40) for use with different groups within the target patient population.