A drive assembly for a drug delivery device (100) is presented. The drive assembly comprises a housing (4) having a proximal end (18) and a distal end (19) and a main drive mechanism comprising a drive member (5), a piston rod (7) and a resilient member (13). The main drive mechanism being configured such that, in a setting mode of operation, the resilient member (13) is biased when a dose of a drug (35) is set and in a dispensing mode of operation, the set dose is dispensed, wherein the drive member (5) drives the piston rod (7). The drive assembly further comprises an auxiliary drive mechanism further comprising an auxiliary drive member (26) which is coupled to the drive member (5). In the dispensing mode of operation, the auxiliary drive mechanism can be actuated by a user via a movement of the auxiliary drive member (26) with respect to the housing (4), thereby mechanically assisting the dispensing action of the main drive mechanism.
