Patent ID: 8210171

Claim:
An inhaler, comprising: a body having an inspiratory airflow path and an elongate chamber configured to receive a generally tubular unitized drug containment system; a generally tubular unitized drug containment system residing in the elongate chamber, the generally tubular unitized drug containment system having a generally open downstream end portion and at least one sealed drug compartment holding dry powder residing upstream of the downstream end portion, wherein the generally tubular drug containment system comprises cooperating, abutting inner and outer generally tubular members that slide to open the sealed drug compartment to thereby release dry powder from the drug compartment without piercing for inhalation; a display and a user input operatively associated with the display held by the body; and an electronic counter held by the body in communication with the display, the counter configured to decrement a dose amount needed after a sub-bolus dose is delivered so that a user can readily ascertain which additional unitized drug containment system to select.