The Physician Prescribes Haloperidol (Haldol) for the Client

The physician prescribes haloperidol (Haldol) for the client. The client says to the nurse "My doctor said this medication is high potency, what does that mean"? What is the best response of the nurse?

A) "High potency means you might have some muscle spasms while taking this medication."
B) "High potency means this medication might make you really sleepy for a while after you begin taking it."
C) "High potency means it is best in decreasing symptoms such as the voices you have been hearing."
D) "High potency means you might have low blood pressure while taking this medication."