A two-year-old toddler who weighs 30 pounds is diagnosed with otitis media. The physician ordered the antibiotic amoxicillin 20mg/kg PO q8 h. The label reads 125 mg in 5 ml. How many millimeters will you administer?
1.75ml
10.9ml
20ml
5ml
The Correct Answer is B
Convert weight to kilograms:
30 lb ÷ 2.2 = 13.64 kg
Calculate dose in mg:
20 mg/kg × 13.64 kg = 272.8 mg per dose
Determine volume to administer:
If 125 mg = 5 mL, then:
(272.8 mg × 5 mL) ÷ 125 mg = 10.912 mL
Round to the nearest tenth:
10.912 mL ≈ 10.9 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Step 1: Use the Holliday-Segar formula for maintenance fluids:
For the first 10 kg: 100 mL/kg/day
For the next 10 kg: 50 mL/kg/day
For any additional kg over 20 kg: 20 mL/kg/day
Step 2: Calculate for 36 kg
First 10 kg → 10 × 100 = 1,000 mL
Next 10 kg → 10 × 50 = 500 mL
Remaining 16 kg → 16 × 20 = 320 mL
Total = 1000 + 500 + 320 = 1,820 mL/day
Step 3: Convert to hourly rate
1820 mL/day ÷ 24 hr = 75.8 mL/hr
= 76 mL/hr (rounded off to the nearest whole number.
Correct Answer is D
Explanation
A. Captopril is an ACE inhibitor, not a diuretic. It is used to treat hypertension and heart failure by lowering blood pressure and reducing afterload.
B. Spironolactone is a potassium-sparing diuretic, meaning it helps the body eliminate fluid without causing potassium loss.
C. Chlorothiazide is a thiazide diuretic and can cause some potassium loss, but it is generally less potent than loop diuretics like furosemide.
D. Furosemide (Lasix/LSK) is a loop diuretic and a non–potassium-sparing diuretic. It is commonly used in children with cardiac conditions to reduce fluid overload but requires careful monitoring of electrolytes, especially potassium, due to the risk of hypokalemia.
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