NCLEX-PN® ExaminationReduction of Risk PotentialEasy
A client is prescribed 500 mg of amoxicillin oral suspension every 8 hours. The medication label states 250 mg/5 mL. How many milliliters should the LPN administer per dose?
- A15 mL
- B5 mL
- C10 mL
- D20 mL
Show answer & explanationAnswer & explanation
Correct answer: C. 10 mL
To calculate the dose: (Desired Dose / Available Concentration) x Volume. (500 mg / 250 mg) x 5 mL = 2 x 5 mL = 10 mL.
Why the other options are wrong
- A. 15 mL would provide 750 mg, which is an overdose.
- B. 5 mL would only provide 250 mg, which is half of the prescribed dose.
- D. 20 mL would provide 1000 mg, which is a significant overdose.
Medication Dosage Calculation
The process of determining the correct volume or quantity of medication to administer based on the prescribed dose and available concentration.
- Formula: (Desired Dose / Available Concentration) x Volume.
- Ensure units are consistent before calculation.
- Double-check calculations to prevent medication errors.
Memory trick: Think 'D/H x V': Doctors Have Values, which helps you get the right dose.