An inhaler for delivering dry-powder medicament to a patient from an open blister pocket of a blister pack. The blister pack is in the form of a flexible elongate strip including a base sheet having a plurality of recesses spaced along its length and a cover sheet peelably sealed to the base sheet to define a plurality of blister pockets each containing a measured dose of the medicament. The inhaler also includes a housing for enclosing used and unused portions of the blister pack together with the medicament dispensing mechanism. The housing defines internal transverse walls extending in the width direction of the blister pack for isolating the used portion of the cover sheet from the unused portion of the blister pack.
