The recommended dosage of amoxicillin is 20 to 40 mg/kg/day divided in equal doses q h. The medication is supplied as 50 mg/mL oral suspension.
The child weighs 72.6 lb. Calculate the single-dose range for this child.
The Correct Answer is ["440"]
Step 1: Convert pounds to kilograms. 72.6 lb ÷ (2.2 lb/1 kg) = 33 kg.
Step 2: Calculate the lower end of the daily dosage range in milligrams. 20 mg/kg/day × 33 kg = 660 mg/day.
Step 3: Calculate the upper end of the daily dosage range in milligrams. 40 mg/kg/day × 33 kg = 1320 mg/day.
Step 4: Calculate the lower end of the single-dose range in milligrams. 660 mg/day ÷ 3 doses/day = 220 mg/dose.
Step 5: Calculate the upper end of the single-dose range in milligrams. 1320 mg/day ÷ 3 doses/day = 440 mg/dose. The single-dose range for this child is 220 mg to 440 mg.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
A negative chest x-ray, while indicative of resolving lung pathology, does not definitively confirm the absence of viable Mycobacterium tuberculosis. Radiographic resolution can lag behind bacteriologic clearance, meaning granulomas might still be present even if the active infection has been eliminated, and thus transmissibility cannot be excluded solely based on imaging.
Choice B rationale
The absence of clinical symptoms, such as cough, fever, or weight loss, suggests clinical improvement but does not guarantee bacteriologic cure or non-infectiousness. A patient can be asymptomatic yet still shed viable mycobacteria, posing a risk of transmission to others. Bacteriological confirmation is essential.
Choice C rationale
Three negative sputum cultures, typically collected on separate days, are the gold standard for confirming that a patient with tuberculosis is no longer infectious. This indicates the absence of viable Mycobacterium tuberculosis in respiratory secretions, significantly reducing the risk of transmission to others due to the inability to aerosolize infectious particles.
Choice D rationale
A negative skin test, or tuberculin skin test (TST), indicates the absence of a delayed-type hypersensitivity reaction to M. tuberculosis antigens. It primarily reflects exposure and immune response, not active infection or infectiousness. A previously positive TST usually remains positive even after successful treatment, so a negative result in a treated patient is not a measure of non-infectiousness.
Correct Answer is ["200"]
Explanation
Calculate the milligrams per dose. 600 mg/day ÷ 3 doses/day = 200 mg/dose. The patient will receive 200 mg per dose.
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