An autoinjector that includes a canister having a liquefied gas, a flow regulator, and an actuator is provided. The flow regulator engages the canister to receive a flow of gas generated by the liquefied gas. The actuator is coupled to the canister and the flow regulator, and includes a passageway for receiving the flow of gas downstream from the flow regulator. The actuator moves relative to the canister between an engaged position whereby the flow regulator is in fluid communication with the canister for receiving the flow of gas and a storage position whereby the flow regulator is spaced from the canister.
