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.
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Related Questions
Correct Answer is ["B","E"]
Explanation
A. Serum potassium within the reference range is not typically a cause for concern in this scenario.
B. A hemoglobin A1C level of 7% indicates poor glycemic control and may suggest the need for adjustment in diabetes management, as it exceeds the recommended target range.
C. Total cholesterol within the reference range is not the most significant finding to report in this scenario.
D. Hematocrit within the reference range is not the most significant finding to report in this scenario.
E. A random plasma glucose level of 200 mg/dl (11.1 mmol/L) is indicative of hyperglycemia and requires attention as it suggests poor glycemic control, potentially related to diabetes.
Correct Answer is ["1.4"]
Explanation
To calculate the dosage of lorazepam for the client, first determine the total micrograms required by multiplying the client's weight in kilograms by the prescribed amount per kilogram. For a client weighing 65 kg prescribed 44 mcg/kg, the total dosage would be 65 kg x 44 mcg/kg, which equals 2860 mcg. Since the medication is available in a concentration of 2 mg/ml, convert the total dosage from micrograms to milligrams by dividing by 1000 (because there are 1000 micrograms in a milligram). This results in 2.86 mg. Finally, to find out how many milliliters to administer, divide the total milligrams needed by the concentration of the vial, which is 2 mg/ml. Therefore, 2.86 mg / 2 mg/ml equals 1.43 ml. When rounding to the nearest tenth, the nurse should administer 1.4 ml of lorazepam.
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