A nurse is preparing to administer amoxicillin 30 mg/kg/day divided equally 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? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
To determine the amount of amoxicillin suspension to administer, follow these steps:
Step-by-Step Calculation:
- Convert the Toddler’s Weight to Kilograms:
- Weight in pounds: 33 lb
- Conversion factor: 1 lb = 0.454 kg
- Weight in kilograms: 33 lb×0.454 kg/lb=15 kg33 \text{ lb} \times 0.454 \text{ kg/lb} = 15 \text{ kg}33 lb×0.454 kg/lb=15 kg
- Calculate the Total Daily Dose:
- Dose per kilogram per day: 30 mg/kg/day
- Total daily dose: 15 kg×30 mg/kg/day=450 mg/day15 \text{ kg} \times 30 \text{ mg/kg/day} = 450 \text{ mg/day}15 kg×30 mg/kg/day=450 mg/day
- Determine the Dose for Each Administration:
- The dose is divided equally every 12 hours, so there are 2 doses per day.
- Dose per administration: 450 mg/day2=225 mg/dose\frac{450 \text{ mg/day}}{2} = 225 \text{ mg/dose}2450 mg/day=225 mg/dose
- Find the Volume of Suspension Required for Each Dose:
- Concentration of suspension: 200 mg/5 mL
- Volume needed: 225 mg200 mg×5 mL\frac{225 \text{ mg}}{200 \text{ mg}} \times 5 \text{ mL}200 mg225 mg×5 mL
- Volume needed: 225 mg200 mg×5 mL=5.625 mL\frac{225 \text{ mg}}{200 \text{ mg}} \times 5 \text{ mL} = 5.625 \text{ mL}200 mg225 mg×5 mL=5.625 mL
- Round to the Nearest Tenth:
- Volume to administer: 5.6 mL
Answer:
The nurse should administer 5.6 mL of amoxicillin suspension for each dose.