A nurse is preparing to administer amoxicillin 30 mg/kg/day divided doses every 12 hr to a toddler who weighs 33 lb. Available is amoxicillin 200 mg/5 mL suspension. How many mL should the nurse administer every 12 hr? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
5 mL
5.6 mL
0.5 mL
6 mL
The Correct Answer is B
Given:
Ordered dose of amoxicillin: 30 mg/kg/day divided every 12 hours
Toddler's weight: 33 lbs
Concentration of amoxicillin suspension: 200 mg/5 mL
Step 1: Convert the toddler's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Weight in kg = 33 lbs x 0.453592 kg/lb = 14.968 kg
Step 2: Calculate the total daily dose of amoxicillin:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Weight (kg)
Total daily dose (mg) = 30 mg/kg/day x 14.968 kg
Total daily dose (mg) = 449.04 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) = 449.04 mg/day / 2 administrations/day
Dose per administration (mg) = 224.52 mg
Step 4: Calculate the volume to be administered:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 224.52 mg / (200 mg/5 mL)
Volume (mL) = 224.52 mg x (5 mL / 200 mg)
Volume (mL) = 5.613 mL
Step 5: Round to the nearest tenth:
Volume (mL) ≈ 5.6 mL
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Related Questions
Correct Answer is B
Explanation
Given:
Ordered dose of phenobarbital: 6 mg/kg/day divided equally every 12 hours
Patient weight: 44 lbs
Concentration of phenobarbital elixir: 20 mg/5 mL
Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 44 lbs x 0.453592 kg/lb = 19.958 kg
Step 2: Calculate the total daily dose of phenobarbital:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Patient weight (kg)
Total daily dose (mg) = 6 mg/kg/day x 19.958 kg
Total daily dose (mg) = 119.748 mg/day
Step 3: Calculate the dose per administration:
Dose per administration (mg) = Total daily dose (mg) / Number of administrations per day
Dose per administration (mg) = 119.748 mg/day / 2 administrations/day
Dose per administration (mg) = 59.874 mg
Step 4: Calculate the volume to be administered per dose:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 59.874 mg / (20 mg/5 mL)
Volume (mL) = 59.874 mg x (5 mL / 20 mg)
Volume (mL) = 14.9685 mL
Step 5: Round to the nearest whole number:
Volume (mL) ≈ 15 mL
Correct Answer is B
Explanation
Given:
Ordered dose of amoxicillin: 30 mg/kg/day divided every 12 hours
Toddler's weight: 33 lbs
Concentration of amoxicillin suspension: 200 mg/5 mL
Step 1: Convert the toddler's weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Weight in kg = 33 lbs x 0.453592 kg/lb = 14.968 kg
Step 2: Calculate the total daily dose of amoxicillin:
Total daily dose (mg) = Ordered dose (mg/kg/day) x Weight (kg)
Total daily dose (mg) = 30 mg/kg/day x 14.968 kg
Total daily dose (mg) = 449.04 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) = 449.04 mg/day / 2 administrations/day
Dose per administration (mg) = 224.52 mg
Step 4: Calculate the volume to be administered:
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
Volume (mL) = 224.52 mg / (200 mg/5 mL)
Volume (mL) = 224.52 mg x (5 mL / 200 mg)
Volume (mL) = 5.613 mL
Step 5: Round to the nearest tenth:
Volume (mL) ≈ 5.6 mL
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