A child who weighs 18 pounds recieves a prescription for amoxicillin 25 mg/kg/day by mouth in divided doses every 12 hours. The bottle labeled, "Amoxicillin for Oral Suspension, USP 400 mg per 5 mL." How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is required, round to the nearest tenth.)
The Correct Answer is ["1.3"]
Given:
Ordered dose of amoxicillin: 25 mg/kg/day
Child's weight: 18 pounds
Concentration of amoxicillin suspension: 400 mg/5 mL
Step 1: Convert child's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Child's weight in kg = 18 lbs x 0.453592 kg/lb = 8.164656 kg
Step 2: Calculate the total daily dose of amoxicillin:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Child's weight (kg)
Total daily dose (mg) = 25 mg/kg/day x 8.164656 kg
Total daily dose (mg) = 204.1164 mg/day
Step 3: Calculate the dose per administration:
Since the medication is given every 12 hours, there are 2 administrations per day.
Dose per administration (mg) = Total daily dose (mg) / Number of administrations per day
Dose per administration (mg) = 204.1164 mg/day / 2 administrations/day
Dose per administration (mg) = 102.0582 mg
Step 4: Calculate the volume to be administered per dose:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 102.0582 mg / (400 mg/5 mL)
Volume (mL) = 102.0582 mg x (5 mL / 400 mg)
Volume (mL) = 1.2757275 mL
Step 5: Round to the nearest tenth:
Volume (mL) ≈ 1.3 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["125"]
Explanation
Given:
Total dose of Potassium Chloride: 80 mEq
Volume of solution: 1 liter (1000 mL)
Infusion rate: 10 mEq/hour
Step 1: Determine the concentration of Potassium Chloride in the solution:
Concentration (mEq/mL) = Total Potassium Chloride (mEq) / Volume of solution (mL)
Concentration (mEq/mL) = 80 mEq / 1000 mL
Concentration (mEq/mL) = 0.08 mEq/mL
Step 2: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Infusion rate (mEq/hr) / Concentration (mEq/mL)
Infusion rate (mL/hr) = 10 mEq/hr / 0.08 mEq/mL
Infusion rate (mL/hr) = 125 mL/hr
Correct Answer is ["40"]
Explanation
Given:
Vial strength: Cefotaxime 2 grams (2000 mg)
Volume of diluent: 50 mL of normal saline
Step 1: Calculate the concentration of Cefotaxime in the reconstituted solution:
Concentration (mg/mL) = Total amount of Cefotaxime (mg) / Total volume of solution (mL)
Concentration (mg/mL) = 2000 mg / 50 mL
Concentration (mg/mL) = 40 mg/mL
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