Aerosol Canister Employing a Polymeric Film Having Improved Moisture Barrier Properties

摘要

A metered dose inhaler for delivering a pharmaceutical aerosol formulation comprises a canister containing the pharmaceutical aerosol formulation therein; a ferrule attached to said canister, the ferrule comprising a valve body having at least one opening therein to allow a quantity of the pharmaceutical aerosol formulation to pass from the container into the valve; and a polymeric film positioned between the ferrule and the canister, the polymeric film being present so as to serve as a moisture barrier relative to said canister.