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EpiPen injection. Uses. This medication is used in emergencies to treat very serious allergic reactions to insect stings/bites, foods, drugs, or other substances. Epinephrine acts quickly to improve breathing, stimulate the heart, raise a dropping blood pressure, reverse hives, and reduce swelling of the face, lips, and throat.
Epinephrine, also known as adrenalin, is a hormone that is responsible for the fight or flight reaction in mammals. Chemically, it mobilizes the body's defense system, inducing the release into the blood of large amounts of glucose from stores in the liver and muscles.ndeed, during the fight or flight reaction, the organism needs to release energy in the form of glucose and fatty acids rather than store energy as glycogen or fat. Figure 1. Chemical structure of epinephrine. Clinically, epinephrine plays a lifesaving role in countering the effects of anaphylactic shock.