EpiPen adrenaline syringe and packaging. This device is used for the emergency treatment of anaphylactic shock, a type of allergic reaction that can be fatal in minutes. The EpiPen is an auto-injector that can be self-administered. This is the adult version containing 0.3 milligrams of adrenaline. Common allergens that can trigger anaphylaxis include nuts, seafood and wasp stings. The symptoms of anaphylaxis include local or systemic swelling, a drop in blood pressure and breathing difficulties. People who are susceptible to such attacks should carry adrenaline with them.