Table of Contents
Practice Problem Set: Calculating Dosages for Different Routes of Administration
Introduction
Accurate calculation of medication dosages is essential for safe patient care. This practice problem set focuses on calculating dosages for various routes of administration, including oral, intravenous, and topical. Use the information provided in each problem to determine the correct dosage.
Practice Problems
Problem 1: Oral Administration
A patient needs a medication that requires a dose of 250 mg. The medication is supplied as a tablet containing 50 mg. How many tablets should the patient take?
Problem 2: Intravenous (IV) Administration
An IV infusion is ordered at 100 mL/hour. The medication concentration is 50 mg/100 mL. How much medication (in mg) is administered per hour?
Problem 3: Topical Application
A cream is prescribed at a dose of 2 grams per square centimeter. If a patient’s affected area measures 15 cm by 10 cm, how much cream is needed?
Solutions
Solution to Problem 1
Number of tablets = Total dose / Dose per tablet = 250 mg / 50 mg = 5 tablets
Solution to Problem 2
Medication administered per hour = (Concentration in mg/100 mL) × (Volume per hour in mL) / 100 = 50 mg × 100 mL / 100 = 50 mg
Solution to Problem 3
Total area = 15 cm × 10 cm = 150 cm2
Cream needed = Area × Dose per cm2 = 150 cm2 × 2 g/cm2 = 300 grams
Conclusion
Calculating medication dosages accurately ensures safe and effective patient care. Always double-check your calculations and consult prescribing information when in doubt.