A medical device (10) includes a syringe assembly (20) and a shield system (22) for delivering medicament to a patient. The syringe assembly includes a barrel (24) defining a medicament reservoir (25), a needle cannula (26) coupled to the barrel and in fluid communication with the reservoir, a plunger (28) having a stopper (30) positioned in the reservoir and a thumb pad (32) for moving the plunger in the reservoir. The shield system has a shield coupled to a forward end of the barrel, the shield being movable from a first position disposed from the needle cannula tip to a second position during insertion of the needle into a patient and movable from the second position to a third position covering the needle cannula tip after the needle cannula is removed from the patient. An urging member (42) urges the shield to the third position upon removal of the needle cannula from the patient.
