Abstract: A medicinal inhalator utilizing a restriction chamber to mix pressurized medication with air drawn through a filter in a supply duct and to create a flow resistance necessarily causing the medication and air mixture to be drawn into the lungs of the user. The inhalator includes a supply duct which receives a pressurized container of medication, the medication being released upon depression of the container against a surface of a boss formed in the supply duct. The pressurized medication flows through a transmission passage and is mixed with incoming air in a restriction chamber containing a rotating turbine which is in fluid communication with a mouthpiece incorporating a venturi increasing air flow velocity. The restriction chamber can include one or a plurality of rotating turbines in series providing desired predetermined resistance to suction during use of the inhalator.