A nurse is caring for a client who is experiencing anaphylactic shock in response to the administration of penicillin. Which of the following medications should the nurse administer first?

A. Furosemide: Furosemide is a diuretic used to manage fluid overload and edema, typically in conditions like heart failure or kidney disease. It does not address the immediate life-threatening symptoms of anaphylactic shock, such as airway constriction and hypotension. B. Dobutamine: Dobutamine is an inotropic agent used to increase cardiac output in cases of heart failure or shock related to low cardiac output. It is not the first-line treatment for anaphylactic shock, where airway management and vasoconstriction are the priorities. C. Epinephrine: Epinephrine is the first-line treatment for anaphylactic shock. It works rapidly to reverse the life-threatening symptoms of anaphylaxis by causing vasoconstriction (to raise blood pressure), relaxing bronchial smooth muscle (to alleviate airway constriction), and inhibiting further release of histamine. D. Methylprednisolone: Methylprednisolone is a corticosteroid used to reduce inflammation and immune responses. However it does not address the immediate, life-threatening symptoms of anaphylactic shock, such as bronchoconstriction and hypotension.