An actuator for a metered-dose inhaler is provided. The actuator comprises a housing having a mouthpiece portion and a canister receiving portion configured to receive a canister. The actuator further comprises a member disposed within the housing and defining a valve stem receptacle configured to receive a valve stem of the canister. An orifice is formed in the member, which is in fluid communication with the valve stem receptacle and extending to a face of the member opposite to the valve stem receptacle. A longitudinal axis of the orifice is aligned with a longitudinal axis of the valve stem receptacle. At least one air inlet opening is provided in an outer shell of the housing so as to be spaced from an opening for receiving the canister and a mouthpiece opening.
