A medical injector includes an injector housing defining a reservoir, a plunger rod, and a stopper engaged with a portion of the plunger rod. The stopper being slidably disposed within the reservoir and sized relative to an interior of the injector housing to provide sealing engagement with a sidewall of the injector housing. The medical injector further includes a needle having a sharpened first end and a second end in communication with the reservoir, a first cap covering the sharpened first end of the needle, and a second cap covering at least a part of the first cap. The second cap includes a body having a proximal end, a distal end, and a flange provided adjacent the distal end. The second cap is engaged with the first cap such that removal of the second cap simultaneously removes the first cap from the first end of the needle.
