Question

Give "Drug X" 5.0 mg/kg per day in two divided doses. The patient weighs 53 lb . How many mg should be given per dose? How many mg should be given per day?

Answer 1

26.5 doses of drug it will make sense.

Answer 2

Answer : The amount of drug X given per day should be 120.2 mg.

The amount of drug X given per dose should be 60.1 mg.

Explanation :

First we have to convert the weight of patient from lb to kg.

Conversion used :

$1kg=2.205lb$

or,

$1lb=\frac{1}{2.205}kg$

As, $1lb=\frac{1}{2.205}kg$

So, $53lb=\frac{53}{2.205}kg=24.04kg$

The weight of patient is, 24.04 kg.

Now we have to determine the amount of drug X should be given per day.

As, 1 kg weight of patient contains 5.0 mg of drug X per day

So, 24.04 kg weight of patient contains 24.04 × 5.0 = 120.2 mg of drug X per day

The amount of drug X given per day should be 120.2 mg.

Now we have to determine the amount of drug X should be given per dose.

In 2 doses, the patient contains 120.2 mg of drug X

In 1 dose, the patient contains $\frac{120.2}{2}=60.1mg$ of drug X

The amount of drug X given per dose should be 60.1 mg.