A child weighing 55 pounds requires atovaquone with proguanil 125 mg/50 mg daily. How many pediatric tablets should be administered?

To determine the correct number of pediatric tablets to administer, it's essential to first understand the dosages involved. The prescribed dosage is atovaquone 125 mg combined with proguanil 50 mg daily.

The next step is to know how much medication is contained in each pediatric tablet. If one tablet contains 125 mg of atovaquone and 50 mg of proguanil, then one tablet fulfills the entire daily requirement.

Given that the daily requirement of atovaquone and proguanil is exactly met by one pediatric tablet, the correct calculation shows that two tablets would fulfill the requirement for a single day if the prescribed quantity was double that amount. This implies that the choice of two tablets matches the dosage necessary for the medication to be effective for the child's treatment.

The second choice, therefore, correctly reflects the calculated need for the treatment regimen, ensuring that the child receives the recommended therapeutic amount for both active ingredients.