Drug delivery device

Abstract

A kit includes a drug delivery device and a dispensing unit. The drug delivery device includes a housing, a resetting element and a piston rod and the dispensing unit includes a cartridge holder. The cartridge holder is to be mounted to the housing and to receive a cartridge filled with a drug. The piston rod is to move in a proximal direction out of the housing for ejecting the drug and the resetting element is configured to rotate relative to the housing when no dispensing unit is attached to the housing and to thereby move the piston rod back into the housing. The dispensing unit is configured to press axially against the resetting element upon mounting to the housing to move the resetting element in the distal direction into the housing, and thereby rotationally lock the resetting element with respect to the housing.

Dependencies are inferred from the claim text.