问题
单项选择题
Promethazine hydrochloride (Phenergan) 35 mg IM is ordered for a client who is experiencing nausea and vomiting after surgery. The ampule’s label reads 25 mg/mL. How many mL should the nurse prepare to administer
A. 0.7 mL.
B. 1.0 mL.
C. 1.4 mL.
D. 1.8 mL.
答案
参考答案：C
解析：35mg/x mL=25mg/mL, x=1.4mL.