A missionary diagnosed with threadworms is prescribed ivermectin. How much should the nurse administer based on a weight of 132 lbs?

To determine the appropriate dose of ivermectin for a patient weighing 132 lbs, it is essential to understand the standard dosing guidelines for the medication, which are typically based on body weight. Ivermectin is commonly dosed at a rate of approximately 200 micrograms per kilogram of body weight for the treatment of various parasitic infections, including threadworms.

First, convert pounds to kilograms since dosing calculations are made in kg. There are approximately 2.2 lbs in 1 kg, so dividing 132 lbs by 2.2 gives about 60 kg (132 lbs / 2.2 lbs/kg = ~60 kg).

Next, multiply the weight in kilograms by the dosage rate. So, for a 60 kg person, the calculation would be:

60 kg × 200 mcg/kg = 12,000 mcg, or 12 mg.

This calculation confirms that the correct printed answer is indeed 12 mg, making it appropriate for the treatment of threadworms.