epipen

/EH0 P AH0 P AH0 N/
noun
  1. 1

    An epinephrine/adrenaline autoinjector. A lifesaving device designed to ease the symptoms of anaphylaxis/anaphylactic shock, so as to save the life of the victim of the extreme allergic reaction, by injecting a dose of adrenaline/epinephrine through a spring-loaded needle that punches into the tissue it is triggered against.

Source: https://en.wiktionary.org/wiki/epipen