Calculate the amount of amoxicillin oral suspension to administer to an 8-year-old male who weighs 54 lb.
Ordered:
Amoxicillin, oral suspension, 40 mg/kg/day in divided doses q8h
On hand: Amoxicillin, oral suspension 250 mg/5 mL
The Correct Answer is ["6.55"]
- Convert the patient's weight from pounds (lb) to kilograms (kg)
Patient's weight in kg = 54 lb / 2.2 lb/kg
= 24.5454 kg.
- Calculate the total daily dose in milligrams (mg).
Total daily dose = Ordered dose (mg/kg/day) × Patient's weight (kg)
= 40 mg/kg/day × 24.5454 kg
= 981.816 mg/day.
- Calculate the dose per administration (since the medication is given "q8h," which is 3 doses/day).
Dose per administration = Total daily dose (mg/day) / 3 doses/day
= 981.816 mg / 3
= 327.272 mg/dose.
- Determine the concentration of the available medication.
Available is 250 mg in 5 mL.
Concentration = 250 mg / 5 mL
= 50 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
= 327.272 mg / 50 mg/mL
= 6.5454 mL/dose.
- Round the answer to the nearest hundredth.
= 6.55 mL/dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
- Determine the number of tablets per dose.
Ordered dose is 75 mg
Available tablet strength is 25 mg.
Tablets per dose = 75 mg / 25 mg
= 3 tablets.
- Calculate the total number of tablets per day.
The frequency is "bid," which means twice a day.
Tablets per day = 3 tablets/dose × 2 doses/day
= 6 tablets per day.
- Calculate the total number of tablets needed for the 4-day supply.
Total tablets = 6 tablets/day × 4 days
= 24 tablets.
Correct Answer is B
Explanation
Calculation:
- Calculate the total number of capsules taken over the 6-day period.
The patient took 1 capsule every 6 hours.
Number of capsules per day = 24 hours / 6 hours/dose
= 4 capsules/day.
Total capsules taken = 4 capsules/day × 6 days
= 24 capsules.
Total amount of Keflex taken = 6,000 mg.
- Calculate the strength of each capsule.
Strength per capsule = Total amount taken (mg) / Total number of capsules
= 6,000 mg / 24 capsules
= 250 mg/capsule.
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