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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.
Epinephrine, also known as adrenaline, is a medication, hormone and neurotransmitter.As a medication it is used for a number of conditions including: anaphylaxis, cardiac arrest, and superficial bleeding. Inhaled epinephrine may be used to improve the symptoms of croup.t plays an important role in the fight-or-flight response by increasing blood flow to muscles, output of the heart, pupil dilation, and blood sugar. Epinephrine does this by its effects on alpha and beta receptors. It is found in many animals and some one cell organisms.