A mouthpiece adapter for inhaler comprises of an adapter upon which a canister is fitted a nozzle is the opening of the said adapter, which outlets in a passage a horizontal restricting wall which is circular, adjoins the said adapter from at the center and to walls of the mouthpiece at the periphery covers the whole area except the opening of the said adapter a grovel shaped restricting wall which adjoins the said nozzle at the center and walls of the passage at the periphery.
