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EpiPen is an injection that contains epinephrine, a chemical that narrows blood vessels and opens airways in the lungs. EpiPens have become a necessity for families with children suffering from severe allergies to counter effects like wheezing, uneven breathing, increased or decreased heart rate, swelling and other potentially fatal reactions.
However, if the victim of a spider bite (or any other sting or bite) begins showing signs of severe allergic reaction, such as breathing difficulty/wheezing, hives, or severe weakness or tiredness, call 911 immediately and make sure the victimâs epinephrine pen is ready for use.