NCLEX RN Dosage Calculation Questions
Question 1 of 5.
The primary healthcare provider (PHCP) prescribes three liters of 0.9% saline to infuse over 24-hours. How many mL per hour will be administered to the client? Fill in the blank.
Answer: 125 mL/hour
Explanation: To calculate mL/hour, convert 3 liters to 3000 mL (since 1 L = 1000 mL) and divide by 24 hours: 3000 mL ÷ 24 hr = 125 mL/hour.
Question 2 of 5.
The nurse is caring for a client who weighs 85 kg (187 lbs) who sustained a 27% total body surface area burn. Using the Parkland formula, calculate how many mL of intravenous fluid (IVF) the nurse will administer in the first eight hours. Fill in the blank.
Answer: 4590 mL
Explanation: The Parkland formula is 4 mL × kg × % burn. For 85 kg and 27% burn: 4 × 85 × 27 = 9180 mL total. Half is given in the first 8 hours: 9180 ÷ 2 = 4590 mL.
Question 3 of 5.
A client with a stroke is prescribed alteplase. The prescription is for 0.9 mg/kg. The client weighs 116.82 kg (257 lbs). How many milligrams will the nurse administer? Fill in the blank. Record your answer to the nearest whole number.
Answer: 105 mg
Explanation: Calculate dose: 0.9 mg/kg × 116.82 kg = 105.138 mg, rounded to 105 mg.
Question 4 of 5.
The primary healthcare provider (PHCP) prescribes 400,000 units of penicillinG benzathine. The label on the medication reads penicillinG benzathine 300,000 units / 10 mL. How many milliliters will the nurse administer to the client? Fill in the blank. Round your answer to the nearest whole number.
Answer: 13 mL
Explanation: Calculate: (400,000 units ÷ 300,000 units) × 10 mL = 1.333 × 10 = 13.33 mL, rounded to 13 mL.
Question 5 of 5.
The primary healthcare provider (PHCP) prescribes 1.5 grams of vancomycin to be infused over 90 minutes. The pharmacy supplies the medication in a bag labeled 1500 mg of Vancomycin in 250 mL of 0.9% saline. How many mL/hour should the nurse administer? Fill in the blank. Round your answer to the nearest whole number.
Answer: 167 mL/hr
Explanation: Convert 90 minutes to 1.5 hours. Flow rate: 250 mL ÷ 1.5 hr = 166.67 mL/hr, rounded to 167 mL/hr.
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