Coding system for a drug delivery device and drug delivery system

摘要

A system for reducing the risk of an incorrect selection or dispensing of a drug dose for use with a cartridge (120) and a cartridge holder (104) so as to prevent unwanted reservoir cross use. The coding system for use with the drug delivery device includes a first partial code feature (150) and a second partial code feature (152). The first partial code feature and the second partial code feature cooperate to supply a combined visual indicator (154) when the cartridge is assembled to the holder for indicating that a correct cartridge has been assembled to the holder.