A nebuliser 1 particularly for home use comprises a housing 2 having an aerosol generator 3 mounted therein. The housing is closed by a hinged cap 4 and has an outlet 5 through which aerosol generated by the generator 3 is delivered. A suitable connector such as a mouthpiece 6 may be connected to the outlet 5. The housing 2 has a receiver for receiving a nebule 8. The receiver comprises a slot 7 which is sized and/or shaped to accommodate only a nebule 8 of predetermined shape and/or size. The nebuliser cap 4 has a nebule opening means which may be in the form of a puncture pin 10 projecting therefrom to pierce the nebule 8 when the cap is moved to the closed position. The pin 10 is hollow or splined to regulate flow from the nebule. The nebuliser 1 also has a switch means for enabling operation of the aerosol generator 3 when the nebule 8 is opened. The switch means comprises a microswitch 12 on the housing which is engageable by a trigger 13 on the cap 4 when the cap is moved to the closed position. Aerosol generated by the aerosol generator 3 is delivered into a chamber defined by the nebuliser housing 2. Air passes into the chamber through air inlets 30. The air entrains the aerosolised medicament and the entrained aerosolised medicament is delivered from the nebuliser through the outlet 5.L’invention concerne un atomiseur (1) destiné, en particulier, à un usage domestique comprenant un logement (2) doté d’un générateur d’aérosol (3) monté dans ledit logement. Le logement est fermé par un couvercle à charnière (4) et comprend une sortie (5) par laquelle l’aérosol généré par le générateur (3) est distribué. Un connecteur approprié, tel qu’une embouchure (6) peut être connecté à la sortie (5). Le logement (2) comprend un récepteur pour recevoir une nébule (8). Le récepteur comprend une fente (7) qui est dimensionnée et/ou mise en forme pour recevoir uniquement une nébule (8) de forme et/ou de taille prédéterminée. Le couvercle de l’atomiseur (4) comprend un moyen
