Epinephrine autoinjector
（重定向自EpiPens）
An epinephrine autoinjector is a medical device for injecting a measured dose or doses of epinephrine (adrenaline) by means of autoinjector technology. It is most often used for the treatment of anaphylaxis. The EpiPen is derived from the Mark I NAAK ComboPen, which was developed for the U.S. military for treating exposure to nerve agents in the course of chemical warfare. Trademark names for the autoinjector device include EpiPen, Emerade, Twinject, Adrenaclick, Anapen, Jext, Allerject, and Auvi-Q.