EpiPen auto-injectors are prescribed to people who have a history or recognised risk of going into anaphylactic shock due to an allergy. The EpiPen is intended for self-administration in an emergency and should be carried with you at all times. The EpiPen is designed to be used by people with no medical training. Your doctor will teach you how and when to use it. The EpiPen should be jabbed into the outer thigh from a distance of approximately 10cm. This releases a spring-activated plunger that pushes the hidden needle into the thigh muscle and delivers a dose of adrenaline. The pen should be held firmly in the thigh for 10 seconds. The EpiPen can be injected through clothes.