Autoinjector

Autoinjector (10) comprising: a housing (20) configured to receive a medical container (30), the medical container having a cartridge (32) defining a reservoir for containing a medical product (31), and the cartridge (32) having a distal end (33) provided with a needle (34), and an open proximal end (35), the open proximal end (35) is configured to receive a plunger rod (36) for pushing a stopper (37) disposed within the barrel (32). The autoinjector (1) further comprises a needle cover (40) coupled to the housing (20) and movable relative to the housing (20) between a first extended position, a retracted position, and a second extended position; an injection mechanism configured to move the plunger rod (36) distally within the cartridge (32) in order to expel the medical product (31) contained within the cartridge (32); and a holder (60) movable relative to the housing (20) between a passive position, in which the holder (60) does not trigger the injection mechanism, and an active position, in which the hold