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The recommended safe dosage of erythromycin for a child is 20 mg/kg/day in four equal doses. The child weighs 33 lb. The medication is supplied in 125 mg/mL. What is the safe and therapeutic dosage for this child?

Answer and Explanation

The Correct Answer is ["0.6"]

Step 1 is: Convert pounds to kilograms 33 ÷ 2.2 = 15 Result = 15 kg

Step 2 is: Multiply weight by dosage 15 × 20 = 300 Result = 300 mg/day

Step 3 is: Divide total daily dose into 4 doses 300 ÷ 4 = 75 Result = 75 mg per dose

Step 4 is: (125 ÷ 1) = 125 mg/mL

Step 5 is: (75 ÷ 125) = 0.6 Result = 0.6 mL per dose

Final answer = 0.6 mL per dose

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Correct Answer is C

Explanation

Choice A reason: Celecoxib, a COX-2 inhibitor, can increase bleeding risk by inhibiting platelet aggregation. Reporting signs of bleeding or bruising is critical, as it may indicate gastrointestinal or systemic bleeding, a known adverse effect. This statement shows appropriate understanding of monitoring for serious side effects.
Choice B reason: Taking celecoxib only as prescribed ensures adherence to the recommended dose and schedule, minimizing risks like gastrointestinal irritation or cardiovascular events. This statement reflects correct understanding of the importance of following medical guidance to optimize safety and efficacy.
Choice C reason: Celecoxib is typically taken once or twice daily, and it can be taken with or without food. Taking it three times daily on an empty stomach is incorrect and may increase gastrointestinal irritation, indicating a need for further education on proper dosing and administration.
Choice D reason: Monitoring urine output is relevant, as celecoxib can cause renal toxicity, leading to decreased urine output or acute kidney injury. This statement shows appropriate awareness of the need to monitor for renal side effects, which is critical for safe use.

Correct Answer is ["50"]

Explanation

Step 1 is: Volume to be infused 300 mL

Step 2 is: Drop factor is 10 gtt/mL 300 × 10 = 3000 drops

Step 3 is: (3000 ÷ 60) = 50 Result = 50 drops per minute

Final answer = 50 drops/minute

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The recommended safe dosage of erythromycin for a child is 20 mg/kg/day in four equal doses. The child weighs 33 lb. The medication is supplied in 125 mg/mL. What is the safe and therapeutic dosage for this child?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A client is prescribed celecoxib for joint pain. What statement by the client indicates a need for further teaching?

Correct Answer is C

Explanation

Zyvox 600 mg IV once a day is ordered for a patient. The Zyvox is dissolved in 300 mL of normal saline and should infuse over 1 hour. Using tubing with a drop factor of 10 gtt/mL, how many drops per minute should the Zyvox be infused?

Correct Answer is ["50"]

Explanation

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