Epinephrine Auto-Injector 0.3 mg Adult Epinephrine Pen (2-Pack) (Rx)Epinephrine Auto Injector 0. 3 mg An Epinephrine Auto Injector 0. 3 mg (commonly known by brand names like EpiPen, Auvi Q, or Adrenaclick) is a prefilled, single use medical device designed to deliver a precise dose (0. 3 milligrams) of epinephrine (also called adrenaline) into the body quickly. It is primarily intended for emergency treatment of life threatening allergic reactions (anaphylaxis). An epinephrine auto injector (0. 3 mg) is a pre filled,