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NMC-CBT Drug Calculations and Numeracy Flashcards

7 cards from real NMC CBT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 NMC-CBT Drug Calculations and Numeracy flashcards as text

  1. A patient requires dopamine at 5 mcg/kg/min. The patient weighs 70 kg. Dopamine 400 mg is in 250 mL of dextrose. What is the infusion rate in mL/hr?

    Answer: 13.1 mL/hr

    Dose = 5 × 70 = 350 mcg/min; concentration = 400,000 mcg ÷ 250 mL = 1600 mcg/mL; rate = 350 ÷ 1600 × 60 ≈ 13.1 mL/hr.

  2. A patient receives 1 litre of Hartmann's solution over 8 hours via a burette (60 drops/mL). What is the drip rate?

    Answer: 125 drops/min

    (1000 × 60) ÷ (8 × 60) = 60,000 ÷ 480 = 125 drops/min.

  3. Warfarin 3.5 mg is prescribed. Tablets come in 0.5 mg and 5 mg strengths. What is the most appropriate combination?

    Answer: Seven 0.5 mg tablets

    3.5 mg ÷ 0.5 mg = 7 tablets of 0.5 mg is the safest single-strength approach.

  4. A patient is prescribed gentamicin 5 mg/kg as a single daily dose. The patient weighs 85 kg. Available is gentamicin 80 mg/2 mL. How many mL are required?

    Answer: 10.6 mL

    Dose = 5 × 85 = 425 mg; concentration = 40 mg/mL; volume = 425 ÷ 40 = 10.625 ≈ 10.6 mL.

  5. Convert 0.05 grams to micrograms.

    Answer: 50,000 mcg

    0.05 g × 1,000 = 50 mg × 1,000 = 50,000 mcg.

  6. An insulin infusion runs at 4 units/hr. The syringe contains 50 units of insulin in 50 mL of 0.9% saline. At what rate (mL/hr) should the pump be set?

    Answer: 4 mL/hr

    Concentration = 50 units ÷ 50 mL = 1 unit/mL; 4 units/hr ÷ 1 unit/mL = 4 mL/hr.

  7. A nurse draws up 0.4 mL from an ampoule of atropine 600 mcg/mL. How many micrograms has she prepared?

    Answer: 240 mcg

    0.4 mL × 600 mcg/mL = 240 mcg.