RNSG1441 IVPB Dosage Problems and solutions Summer 2025

IVPB Dosage Problems and solutions


Problem 1:

A physician orders Ceftriaxone 1g IVPB every 12 hours. The pharmacy dispenses Ceftriaxone
1g in 100 mL of NS, to be infused over 30 minutes.
What is the mL per hour (mL/hr) infusion rate?



Problem 2:

Your patient has an order for Vancomycin 750 mg IVPB every 12 hours. The medication is
supplied as 750 mg in 250 mL of D5W, and it must be infused over 90 minutes.
What is the mL per hour (mL/hr) rate for the infusion?



Problem 3:

A physician prescribes Levofloxacin 500 mg IVPB once daily. The medication comes as 500
mg in 100 mL of NS, and the order states to infuse it over 60 minutes.
What is the mL per hour (mL/hr) rate for the IVPB?



Problem 4:

An order is written for Metronidazole 500 mg IVPB every 8 hours. The pharmacy supplies 500
mg in 50 mL of NS, and it is to be infused over 20 minutes.
What is the mL per hour (mL/hr) rate?



Problem 5:

A physician orders Azithromycin 250 mg IVPB once daily. The drug is supplied as 250 mg in
500 mL of D5W, to be infused over 2 hours.
What is the infusion rate in mL per hour (mL/hr)?