A nebuliser has a housing (19) having a reservoir (2) for the medicament. An aerosol generator (7) receives the medicament by gravity flow and aerosolizes the medicament. A gas venting inlet (21) permits a gas to enter the nebuliser and forms a mixture with the aerosol. There is a passage (20, 24) through which the mixture of the aerosol and the gas is delivered to an outlet port (24) of the nebuliser. The housing has a baffle (25) to direct the mixture of the gas and the aerosol to the outlet port (24), the baffle having an inclined surface oriented to cause aerosol to flow through the outlet port, the baffle being inclined towards the outlet port
