Calculate the Hourly Intravenous (IV) Flow Rates $120 \mathrm{mcg} \text { per hr }$

Calculate the hourly intravenous (IV) flow rates.
-Ordered: Isoproterenol (Isuprel) IV infusion $120 \mathrm{mcg} \text { per hr }$ for a patient with coronary artery disease.
IV solution at bedside: Isuprel $1 \mathrm{mg} \text { in } 500 \mathrm{~mL} \text { of } \mathrm{D} 5 \mathrm{~W}$ infusing at $50 \mathrm{~mL} \text { per hr. }$ a. What is the total drug:total mL ratio?
b. How many mg per hr are ordered?
c. How many mL per hr are ordered?
d. Is the solution infusing at the correct flow rate?
e. If not, what action should the nurse take?