Drug delivery

摘要

A method and apparatus is disclosed for ejecting drug bearing material. The ejected material is ejected as liquid and liquid vapor via an explosive process which can provide a very fast ejection as well as an ejection which has a large throw. The apparatus can provide a nebulizer, inhaler or needleless injector.

主权项

1. Apparatus for delivering a medicament to a user, comprising:
a storage chamber arranged to store a quantity of a selected liquid comprising at least one medicament; an ejection chamber arranged to hold a portion of the selected liquid; an inlet valve arranged to selectively open to allow liquid from said storage chamber into said ejection chamber; and an exit valve arranged to selectively open to eject medicament from said ejection chamber through the exit valve and then through a neck region when a parameter associated with said ejection chamber satisfies a predetermined condition, the neck region being narrower in cross-sectional diameter than the ejection chamber; wherein liquid vapor and/or liquid is ejected from the ejection chamber to thereby deliver medicament, and said exit valve is arranged to open when a temperature of liquid in the ejection chamber is substantially equal to or greater than a saturation temperature associated with the liquid at a pressure equal to a pressure at a location downstream of said exit valve.