An injection device for delivering multiple doses of drug, comprising: - a housing extending along a main axis, - a dose expelling mechanism comprising a piston rod configured to move relative to the housing from a first position to a second position to cause ejection of a dose of drug, the piston rod extending between a proximal piston rod end and a distal piston rod end, - a dose setting mechanism operable to set the dose to be ejected by the dose expelling mechanism, - electronic means for registering a dose setting operation and for registering a dose size of an ejected dose, and - a display adapted to indicate a size of a current set dose, the electronic means being configured to provide a first type of update of the display responsive to dose changing operations of the dose setting mechanism, wherein the electronic means is further configured to - calculate a current accumulated dose from the dose sizes of registered ejected doses to thereby provide an updated value of a total amount of drug ejected, - determine a current remaining dose by comparing the current accumulated dose and the predefined total dose, and - provide a second type of update of the display when during a dose increasing operation of the dose setting mechanism the current set dose exceeds the current remaining dose, the second type of update being different from the first type of update, characterised in that the piston rod comprises a dosing track and is movable relative to the housing from an initial pre-use position to a final end stop position to cause accumulated ejection of a predefined total dose, and the injection device further comprises a dosing track follower fixed with respect to the housing and adapted to travel the dosing track during dose ejection, wherein the final end stop position is defined by a track end configuration of the dosing track between the proximal piston rod end and the distal piston rod end and wherein the track end configuration is arranged at a specific position along the piston rod which correlates an accumulated travel of the dosing track follower from a predetermined pre-use position in or on the dosing track to the track end configuration with an expelling of the predefined total dose. - a housing extending along a main axis, - a dose expelling mechanism comprising a piston rod configured to move relative to the housing from a first position to a second position to cause ejection of a dose of drug, the piston rod extending between a proximal piston rod end and a distal piston rod end, - a dose setting mechanism operable to set the dose to be ejected by the dose expelling mechanism, - electronic means for registering a dose setting operation and for registering a dose size of an ejected dose, and - a display adapted to indicate a size of a current set dose, the electronic means being configured to provide a first type of update of the display responsive to dose changing operations of the dose setting mechanism, wherein the electronic means is further configured to - calculate a current accumulated dose from the dose sizes of registered ejected doses to thereby provide an updated value of a total amount of drug ejected, - determine a current remaining dose by comparing the current accumulated dose and the predefined total dose, and - provide a second type of update of the display when during a dose increasing operation of the dose setting mechanism the current set dose exceeds the current remaining dose, the second type of update being different from the first type of update, <EOS>