A dose for 1 mg of medication per kilogram of body weight is prescribed for a patient weighing 2.7 kg. What is the dose?

A dose for 1 mg of medication per kilogram of body weight is prescribed for a patient weighing 2.7 kg. What is the dose?

• A. 2.7 mg
• B. 1.0 mg
• C. 3.0 mg
• D. 2.0 mg

Answer: (A)

Total dose equals the dose per unit weight times the patient’s weight. Here, 1 mg per kilogram is prescribed, and the patient weighs 2.7 kilograms. Multiply: 1 mg/kg × 2.7 kg = 2.7 mg. The units kg cancel, leaving milligrams, so the dose is 2.7 mg. The other numbers would correspond to different weights (for example, 3.0 mg would match 3 kg, 2.0 mg would match 2 kg, and 1.0 mg would match 1 kg).

Total dose equals the dose per unit weight times the patient’s weight. Here, 1 mg per kilogram is prescribed, and the patient weighs 2.7 kilograms. Multiply: 1 mg/kg × 2.7 kg = 2.7 mg. The units kg cancel, leaving milligrams, so the dose is 2.7 mg. The other numbers would correspond to different weights (for example, 3.0 mg would match 3 kg, 2.0 mg would match 2 kg, and 1.0 mg would match 1 kg).