Physician's Order
The doctor orders Zithromax 500 mg orally, daily for a child who weighs 82 pounds. The safe dose range for this medication is 10-12 mg/kg/day. Zithromax is available in 250mg/tablets.
Is the order safe?
False
True
The Correct Answer is A
- Convert weight to kilograms:
82 lb ÷ 2.2 = 37.27 kg - Calculate safe dose range:
Minimum dose: 10 mg × 37.27 kg = 372.7 mg/day
Maximum dose: 12 mg × 37.27 kg = 447.24 mg/day
- Compare with ordered dose:
Ordered dose = 500 mg/day
Safe range = 372.7 mg to 447.24 mg/day
→ 500 mg exceeds the maximum safe dose (447.24 mg)
Final Answer: No, the order is not safe.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Alcohol should generally be avoided or limited significantly, as it can interfere with seizure control and interact with phenytoin.
B. Antacids can interfere with phenytoin absorption; patients are usually advised to space them out by at least 2 hours, not just 1 hour.
C. Phenytoin does not typically cause urine to turn orange; this is more common with medications like rifampin or phenazopyridine.
D. Phenytoin can cause gingival hyperplasia (gum overgrowth), so regular dental visits every 3 to 6 months are important to monitor and manage oral health.
Correct Answer is A
Explanation
A. Allopurinolis primarily used to lower serum uric acid levelsin clients with chronic goutor conditions causing hyperuricemia. It helps preventgout attacks but is not used to treat acute episodes.
B. Rheumatoid arthritis is treated with anti-inflammatory drugs and disease-modifying antirheumatic drugs (DMARDs), not allopurinol.
C. Allopurinol does not have antibacterialproperties and is not indicated for infections.
D. While it helps preventfuture gout attacks, allopurinol is not used to relieve acute attacks—medications like colchicine or NSAIDsare preferred for that purpose.
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