IMPROVEMENTS IN OR RELATING TO INHALERS

摘要

A dry powder inhaler comprises at least one medicament reservoir containing a bulk quantity of a powdered medicament, and a metering mechanism by which unit doses of said medicament can be dispensed from the medicament reservoir for inhalation by a user of the inhaler. The at least one medicament reservoir is formed in polyester material. Penetration of moisture through the walls of the medicament reservoir is considerably reduced.