There is disclosed a process for providing a filled canister (138) for an inhaler (1), in particular a process for supplying a canister (138) and filling the canister (138) with components of a medicament, which canister (138) is suitable for use in a pressurised metered dose inhaler, preferably a breath-actuate inhaler (1). The process comprises providing a canister (138) that is substantially filled with air at ambient conditions and sealing the opening of the canister (138), for example with a metering valve (134). A filling device dispenses a pressurised liquid and/or gas into the sealed, air-filled canister (138) through the metering valve (134). The pressurised liquid and/or gas comprises at least a propellant. The sealed, air-filled canister (138) is substantially devoid of propellant prior to the step of dispensing the pressurised liquid and/or gas. Thereafter the sealed canister (138) is substantially filled with at least some propellant and some air. Preferably the sealed canister (138) also contains a medicament. In the art, pressure-filled canisters are purged with propellant immediately before sealing to remove the air. The present process excludes the purging step and the sealed canisters (138) contain air and no propellant prior when sealed.Linvention concerne un procédé permettant de fournir une cartouche remplie (138) pour un inhalateur (1), en particulier un procédé de fourniture dune cartouche (138) et de remplissage de la cartouche (138) de constituants dun médicament, ladite cartouche (138) étant adaptée à être utilisée dans un inhalateur doseur sous pression, de préférence un inhalateur activé par la respiration (1). Le procédé comprend la fourniture dune cartouche (138) qui est sensiblement remplie dair dans des conditions ambiantes, et la fermeture hermétique de louverture de la cartouche (138), par exemple à laide dune soupape de dosage (134). Un dispositif de remplissage distribue un liquide et/ou un gaz sous pression dans la cartouche herm
