RMA Medical Mathematics and Dosage Calculations 1

Question 1

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

Accepted Answer

2 tablets

Answer

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

Question 2

Convert 0.5 grams to milligrams.

Accepted Answer

500 mg

Answer

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

Question 3

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

Accepted Answer

70 kg

Answer

154 lbs ÷ 2.2 lbs/kg = 70 kg.

Question 4

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

Accepted Answer

2 tablets

Answer

0.25 mg ÷ 0.125 mg/tablet = 2 tablets.

Question 5

Which formula is the standard method for calculating medication dosage?

Accepted Answer

(Desired ÷ Have) × Quantity

Answer

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

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