单选题 The nurse is caring for a client who is on ritodrine therapy to halt premature labor. What condition indicates an adverse reaction to ritodrine therapy?
A. Hypoglycemia.
B. Crackles.
C. Bradycardia.
D. Hyperkalemia.

【正确答案】 B

【答案解析】Use of ritodrine can lead to pulmonary edema. Therefore, the nurse should assess for crackles and dyspnea. Blood glucose levels may temporarily rise, not fall, with ritodrine. Ritodrine may cause tachycardia, not bradycardia. Ritodrine may also cause hypokalemia, not hyperkalemia.