Question

How many milligrams of a drug should be given to a patient who weighs 22 lb if the dose is 0.2 mg/kg?

1. 2 mg
2. 0.2 mg
3. 4 mg
4. 44 mg

Answer 1

To calculate the number of milligrams of a drug to be given to a patient, we can use the formula: Dose in milligrams = Weight of patient in kilograms x Dose in milligrams per kilogram. First, convert the weight of the patient from pounds to kilograms. Then, calculate the dose in milligrams. The correct answer is option 2: 0.2 mg.

Step-by-step explanation:

To calculate the number of milligrams of a drug to be given to a patient, we can use the formula:

Dose in milligrams = Weight of patient in kilograms x Dose in milligrams per kilogram

First, we need to convert the weight of the patient from pounds to kilograms. Since 1 pound is equal to 0.4536 kilograms, the patient's weight in kilograms would be:

22 lb x 0.4536 kg/lb = 9.9792 kg

Next, we can calculate the dose in milligrams:

Dose in milligrams = 9.9792 kg x 0.2 mg/kg = 1.99584 mg

Therefore, the correct answer is option 2: 0.2 mg.