Final answer:
The nurse should closely assess the client taking a central nervous system stimulant medication for bradycardia as a possible adverse reaction.
Step-by-step explanation:
The nurse should closely assess the client taking a central nervous system stimulant medication for bradycardia as a possible adverse reaction. Bradycardia is a condition characterized by a slower than normal heart rate. Central nervous system stimulant medications can affect the autonomic nervous system and result in a decrease in heart rate.