After Administering Promethazine (Phenergan)for Nausea,the Nurse Takes Extra Precautionary Implementations

After administering promethazine (Phenergan) for nausea,the nurse takes extra precautionary implementations because of the common side effect of antiemetic medications,which is:

A) Check vital signs for erratic blood pressure.
B) Add a blanket to prevent chilling.
C) Provide extra water to combat thirst.
D) Put up side rails to prevent falls.