A nebuliser to deliver a medicament that includes a housing having a reservoirfor the medicament, an aerosol generator that can be supplied the medicamentfrom the reservoir, where the generator aerosolizes at least a portion of themedicament into an aerosol, a gas venting inlet to permit a gas to enter thenebuliser and form a mixture with the aerosol, and a passage through which themixture of the aerosol and the gas is delivered to an outlet port of thenebuliser.