Inhaler device

An inhaler device comprising;

• a chassis defining an interior chamber and an actuation mechanism within the interior chamber, the actuation mechanism comprising:
• an indexing system comprising a first indexer for advancing a first medicament carrier and a second indexer for advancing a second medicament carrier;
• and
• a common actuator for controlling movement of the first and second indexers;
• wherein the common actuator is movable between a first position, a second position, and an intermediate position between the first and second positions;
• wherein the first medicament carrier and the second medicament carrier each separately comprises an elongate blister strip of medicament,
• and wherein progression of the first indexer is disproportional to progression of the second indexer.