Question

Assume the recommended single dose of an antihistamine for a child weighing 48–59 lbs is 2.00 teaspoons. If 1.00 tsp contains 12.5 mg per 5 mL of the active ingredient, how many milligrams of active ingredient does the recommended dose for a child weighing 48–59 lbs contain?

a) 25 mg
b) 37.5 mg
c) 50 mg
d) 75 mg

Answer 1

The recommended dose for a child weighing 48-59 lbs contains 25 mg of active ingredient.

Step-by-step explanation:

To find the number of milligrams of active ingredient in the recommended dose for a child weighing 48-59 lbs, we need to first calculate the amount of active ingredient in 1 teaspoon (5 mL) of the antihistamine. Since 1 teaspoon contains 12.5 mg per 5 mL, we can set up a proportion to find the amount in 2 teaspoons:

1 teaspoon / 12.5 mg = 2 teaspoons / x mg

Cross-multiplying, we get:

1 * x = 12.5 * 2

x = 25 mg

Therefore, the recommended dose for a child weighing 48-59 lbs contains 25 mg of active ingredient.