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An EpiPenÂ® is an autoinjector which delivers a carefully metered dose of epinephrine intramuscularly via a spring-loaded needle. This device is designed to be used in the emergency treatment of severe allergic reactions.
Keep your EpiPen epinephrine auto-injector with you at all times, so you can use it as soon as you experience signs of a serious allergic reaction. Talk to your doctor about the signs and symptoms of a reaction, which may include: 1  Wheezing or difficulty breathing. 2  Closing of the airways. 3  Sneezing.