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‘Adrenaline,” in the synthetic form called epinephrine, “has been used for heart problems for about 100 years” (EMS, 2004). Its effect is to constrict blood vessels and boost blood pressure, thereby restarting the circulation. Adrenaline is often administered as a secondary measure, “when shocking the heart with a defibrillator fails to revive the patient” {AP, 2004).