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Medical Mathematics and Dosage Calculations Flashcards

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

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  1. A physician orders 500 mg of a medication. The available tablets are 250 mg each. How many tablets should be administered?

    Answer: 2 tablets

    Using the D/H × Q formula: (500 mg / 250 mg) × 1 tablet = 2 tablets.

  2. Convert 0.5 grams to milligrams.

    Answer: 500 mg

    There are 1,000 mg in 1 gram, so 0.5 g × 1,000 = 500 mg.

  3. A patient weighs 154 lbs. What is their weight in kilograms? (Use 1 kg = 2.2 lbs)

    Answer: 70 kg

    154 lbs ÷ 2.2 lbs/kg = 70 kg.

  4. The order reads: Give 0.25 mg of digoxin. Available strength is 0.125 mg per tablet. How many tablets should be administered?

    Answer: 2 tablets

    0.25 mg ÷ 0.125 mg/tablet = 2 tablets.

  5. Which formula is the standard method for calculating medication dosage?

    Answer: (Desired ÷ Have) × Quantity

    The D/H × Q (Desired divided by Have, multiplied by Quantity) formula is the standard dosage calculation method.

  6. How many milliliters (mL) are in 1 tablespoon?

    Answer: 15 mL

    1 tablespoon equals 15 mL in standard household-to-metric conversion.

  7. A physician orders 1.5 g of amoxicillin. The medication is available as 500 mg capsules. How many capsules should be given?

    Answer: 3 capsules

    1.5 g = 1,500 mg; 1,500 mg ÷ 500 mg/capsule = 3 capsules.