Final answer:
The nurse must ensure the patient has received adequate fluid replacement before administering norepinephrine to a patient in hypovolemic shock.
Step-by-step explanation:
Before administering norepinephrine (Levophed) for a patient in hypovolemic shock, the nurse ensures that the patient has received adequate fluid replacement. This is critical because norepinephrine constricts blood vessels and can raise blood pressure, but it is essential to first correct the underlying fluid deficit before using vasoactive medications. Otherwise, without adequate volume, the drug could exacerbate the shock by further reducing blood flow to vital organs. Fluid resuscitation is a crucial step in managing hypovolemic shock, which is often caused by hemorrhage or other significant fluid losses, and aims to restore normal circulation and tissue perfusion.