A nurse is caring for a child who has recurrent otitis media. The child weighs 14.9 kg (33 lb). A prescription is written for amoxicillin 40 mg/kg PO to be given in two divided doses per day. The pharmacy provides the nurse with amoxicillin 250 mg/5 mL. How many mL of the medication should the nurse plan to administer for each dose? (Round the answer to the nearest whole number. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["6"]
Calculate the total daily dose:
Total daily dose (mg) = Weight (kg) x Dosage (mg/kg/day)
=14.9 kg x 40 mg/kg/day
= 596 mg/day
Calculate the dose per administration (divided into two doses):
Dose per administration (mg) = Total daily dose (mg) / Number of doses
= 596 mg/day / 2 doses
= 298 mg/dose
Calculate the volume to administer per dose:
Volume (mL) = Desired dose (mg) / Available concentration (mg/mL)
Available concentration = 250 mg / 5 mL
= 50 mg/mL
Volume (mL) = 298 mg / 50 mg/mL
= 5.96 mL/dose
Round to the nearest whole number:
5.96 mL is 6 mL/dose
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["3"]
Explanation
Convert pounds to kilograms:
Conversion factor: 1 kg = 2.2 lb
66 lb / 2.2 lb/kg = 30 kg
Calculate the dose to administer:
Dose (mg) = Weight (kg) × Dosage (mg/kg)
=30 kg × 0.1 mg/kg
= 3 mg
Correct Answer is B
Explanation
A. "Place a thick layer of the medication on open areas." Topical corticosteroids like fluticasone should not be applied in thick layers or to open wounds, as excessive absorption can lead to systemic side effects such as adrenal suppression. A thin layer is sufficient to achieve the desired anti-inflammatory effects while minimizing adverse reactions.
B. “Rub the medication until it disappears.” Topical corticosteroids should be applied in a thin layer and gently rubbed into the skin until no visible residue remains. This ensures even absorption without excessive medication buildup, reducing the risk of local and systemic side effects, especially in infants who have a higher risk of absorption due to their thinner skin.
C. "Cover the area with an occlusive dressing." Occlusive dressings increase medication absorption, which can lead to systemic corticosteroid effects such as skin thinning, delayed wound healing, and adrenal suppression. Occlusion should only be used under medical supervision, especially in infants who are more susceptible to these effects.
D. "Apply the medication to your infant's entire arm." Fluticasone should be applied only to affected areas, not the entire limb. Applying it over a larger area than necessary increases the risk of systemic absorption and side effects. The medication should be used only as directed for targeted treatment of atopic dermatitis.
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