inhalable compositions of the present invention include that the inhaler as a repository for the inhaler : outlet valves for controlling the flow of the composition from the reservoir Valve outlet orifice having a maximum dimension (H) measured in the direction of the opening from a fully opened state Length (L) and the expansion chamber below the valve to a measured diameter (D) in the middle along the expansion chamber And provided with a length (L) and diameter (D), the exit orifice in the lower end of the expansion chamber, and a, where 0.1 & lt h / d & lt 1.0, 0.05 & lt H / D & lt 0.25, 1 & lt D / d & lt 10, 5 & lt L / D & lt 15, 0.1 & lt 1 / D & lt Relates to five inhalers.
