The nurse is applying mafenide acetate (Sulfamylon), a sulfa antibiotic cream, to a clientÔÇÖs lower extremity burn. Which assessment data would require immediate attention by the nurse?

C The clientÔÇÖs ABGs are pH 7.34, PaO2 98, PaCO2 38, and HCO3 20. D The client is able to perform active range-of-motion exercises. A The client complains of pain when the medication is administered. B The clientÔÇÖs potassium level is 3.9 mEq/L and sodium level is 137 mEq/L.