INHALERS

摘要

A metered dose inhaler for receiving a pressurised medicament canister (8) comprises a mouthpiece (2) and a cyclonic flow chamber (4) disposed between the canister and the mouthpiece (2). The flow chamber (4) is arranged so that upon inhalation by a user through the mouthpiece (2), a substantially planar cyclonic flow is generated in the flow chamber (4). The mouthpiece (2) is disposed generally centrally of this planar cyclonic flow.