The Client Receives an Immunostimulant

The client receives an immunostimulant.The client tells the nurse that he gets very sleepy and thirsty every time he takes the medication.What is the best assessment for the nurse to ask?

A) "Are you consuming at least eight glasses of water daily?"
B) "Have you been drinking any alcohol?"
C) "Have you had any flu symptoms lately?"
D) "How much time have you spent out in the sun?"