A blister strip advance mechanism includes: an indexing gear train； drive mechanism configured to drive the indexing gear train； and a hub including a recess shaped to engage a first blister of a blister strip, the hub being rotatable by the indexing gear train to engage the first blister in the recess and move the engaged blister strip such that a second blister is moved to a dosing position at which the second blister can be emptied； wherein the indexing gear train is configured to temporarily disengage the drive mechanism from the hub when the second blister is in the dosing position. Also disclosed is a dosing mechanism including the blister strip advance mechanism； an inhaler including the dosing mechanism； a method for advancing a blister strip； and a method for dosing a medicament including the method for advancing a blister strip.
