An infant who weighs 22 lb receives a prescription for amoxicillin 20 mg/kg/day PO in divided doses every 8 hours. The bottle is labeled, "Amoxicillin for Oral Suspension, USP 250 mg per 5 mL." How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is necessary, round to the nearest tenth.)
The Correct Answer is ["1.3"]
To calculate the dosage of amoxicillin for the infant, first convert the weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The infant weighs 22 pounds, which is equivalent to 10 kilograms (22 lb / 2.2 lb/kg). The prescription is for 20 mg/kg/day, so the total daily dosage is 200 mg (10 kg * 20 mg/kg). This total daily dosage is divided into three doses, as it is to be administered every 8 hours, resulting in
66.7 mg per dose (200 mg / 3). The medication is supplied as 250 mg per 5 mL, so to find out how many mL per dose, set up a proportion: 250 mg is to 5 mL as 66.7 mg is to X mL. Solving for X gives us 1.334 mL (66.7 mg * 5 mL / 250 mg), which rounds to 1.3 mL when rounded to the nearest tenth.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
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Correct Answer is A
Explanation
A. Reminding the UAP to continue rubbing the hands together until they are dry ensures proper use of the hand rub, which is effective when fully dry.
B. Handwashing with soap and water is necessary after certain activities (e.g., after using the restroom, or when hands are visibly soiled), but using an alcohol-based hand rub is appropriate for routine hand hygiene.
C. Supervising in the next client's room is less direct and immediate than ensuring proper technique now.
D. Wearing gloves for all clients is not necessary and does not replace proper hand hygiene.
Correct Answer is B
Explanation
A. A blood alcohol level of 0.09% indicates intoxication but is less immediately critical than lithium toxicity.
B. A serum lithium level of 1.6 mEq/L indicates lithium toxicity, which can be life- threatening and requires immediate medical intervention.
C. Significant weight loss is concerning but not as acute an issue as potential lithium toxicity.
D. Lack of sleep is serious but is a symptom that can be managed; it is not as urgent as addressing potential lithium toxicity.
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