A client is scheduled to receive atenolol 25 mg PO and diltiazem 60 mg PO at 0800. The nurse assesses the client's heart rate as 45 beats/minute and irregular. What is the best nursing action at this time?

A. Administer the medications at different times to provide an even blood level: This option is inappropriate given the client's current heart rate. Both atenolol and diltiazem are cardiovascular medications that can further lower heart rate and potentially lead to bradycardia or other complications. B. Assess the client's blood pressure and if the BP is normal, administer the medications: While it's important to assess blood pressure, both medications can further decrease heart rate. Given the current bradycardia (heart rate of 45 beats/min), administering either medication could exacerbate the issue. C. Document the pulse rate and administer the medications as prescribed: This option is not appropriate. The pulse rate of 45 beats/minute is significantly below the normal range, and administering medications that can lower heart rate further could pose serious risks. D. Withhold the medications and reassess the heart rate in 30 minutes: This is the best nursing action. Withholding the medications allows for further evaluation of the client's heart rate, and it ensures that the nurse can prevent potential adverse effects related to the bradycardia.