Abstract: An injector module includes a housing, a reservoir, a superelastic needle, and an actuator. The reservoir is positioned in the housing and stores epinephrine therein. The superelastic needle is positioned within the housing in a retracted position and is fluidly coupled with the reservoir. The superelastic needle has a gauge between eighteen and twenty-five. The actuator is configured to apply an actuator force on the superelastic needle such that the superelastic needle is moved from the retracted position to an injecting position where a tip of the superelastic needle protrudes from the housing between about fifteen millimeters and about thirty-five millimeters.