Question

An infant weighing 17.5 lb has been exposed to the flu virus in the community. The recommended dose of a prophylactic Tamiflu treatment is 3.00 mg per kg b.i.d. How many times a day should Tamiflu be administered?

How many milligrams of Tamiflu should be given at every administration?

Answer 1

• twice a day
• 23.81 mg

Step-by-step explanation:

You want to know the dosage in milligrams for an infant weighing 17.5 lb when the prescription is 3.00 mg/kg b.i.d.

Mass

The conversion factor for pounds to kilograms is ...

1 lb = 0.45359237 kg . . . exactly

This means that 17.5 lb corresponds to ...

17.5 lb × 0.45359237 kg/lb = 7.937866475 kg

Dose

At 3.00 mg/kg, the required dose is ...

(3.00 mg/kg)(7.937866475 kg) ≈ 23.81 mg

Each administration of the medicine should be 23.81 mg.

Frequency

The abbreviation b.i.d. is for the Latin "bis in die", which means "twice a day."

The medicine should be administered 2 times a day.