Question

A doctor orders oral diphenhydramine once a day for a 70-lb child. The dose is 0.3 mg/kg. What is the total daily amount to be given to the child?

A) 106 mg
B) 9.54 mg
C) 233 mg
D) 21 mg

Answer 1

To calculate the total daily amount of oral diphenhydramine for a 70-lb child, multiply the child's weight in kg by the dose of 0.3 mg/kg. The correct answer is option D) 10 mg.

Step-by-step explanation:

To calculate the total daily amount of oral diphenhydramine for a 70-lb child, we need to determine the child's weight in kg first. We know that 1 lb is approximately equal to 0.4536 kg. So, the child's weight in kg is 70 lb * 0.4536 kg/lb = 31.752 kg.

Next, we can calculate the total daily dose of diphenhydramine by multiplying the child's weight in kg by the dose of 0.3 mg/kg. Therefore, the total daily amount to be given to the child is 31.752 kg * 0.3 mg/kg = 9.5256 mg.

Rounded to the nearest whole number, the total daily amount of diphenhydramine to be given to the child is 10 mg. Therefore, the correct answer is option D) 10 mg.