EP3694590A1 — Drug delivery systems and related methods

USPTO Abstract

Systems and methods for isolating and / or desiccating a portion of a drug delivery tract of a drug delivery apparatus to reduce the amount of water vapor within the drug delivery tract -this. For example, the invention relates to a metered dose inhaler for delivering an aerosol drug or other material to a user. The aerosol medication or other material may be evacuated from a discharge passage within the inhaler to an inhalation passageway for inhalation by a user, and the inhaler may include a sealing designed to selectively isolate the exhaust passage from the inhalation passage and the external environment during inactivity. The inhaler may further include a desiccant material disposed to remove moisture from the isolated discharge passage. In other cases, a desiccant material may be arranged to remove moisture from the inhaler vent passage without isolating the discharge passage during inactivity.