A nurse is monitoring a client who received epinephrine for angioedema after a first dose of losartan. Which of the following data indicates a therapeutic response to the epinephrine?

A. Client reports decreased groin pain of 3 on a 1 to 10 scale.: Relief of groin pain is unrelated to epinephrine administration for angioedema. Epinephrine targets airway swelling and systemic allergic reactions, not musculoskeletal pain. This finding does not indicate a therapeutic response. B. The client tolerates a second dose of medication with no greater than 1+ peripheral edema.: Tolerance of a second dose of losartan is not a direct measure of epinephrine’s effect. Peripheral edema may be unrelated or a chronic condition, so it does not accurately reflect resolution of angioedema. C. The client's blood pressure when arising from resting position is at premedication levels.: Blood pressure normalization may indicate overall hemodynamic stability but does not specifically show improvement in airway swelling or respiratory function, which are the critical targets of epinephrine therapy in angioedema. D. Respirations are unlabored: Epinephrine reduces airway swelling and opens the respiratory passages in angioedema, leading to easier breathing. Observing unlabored respirations demonstrates effective reversal of airway obstruction and is the primary indicator of therapeutic response.