During a Teaching Session About Self-Monitoring While Taking a Beta

During a teaching session about self-monitoring while taking a beta blocker at home,the nurse has taught the patient to take his apical pulse daily for 1 minute.If the pulse rate decreases to less than 60 beats/min,the nurse will instruct the patient to:

A) notify his prescriber.
B) reduce the dose of his beta blocker by half.
C) continue the medication because this is an expected effect.
D) skip the medication dose that day,and check his pulse again the next day.