Ordered: Amoxicillin 250 mg tid for 7 days
On hand: See label
Note: Partial bottles are not dispensed.
How much amoxicillin should be dispensed?
The Correct Answer is ["200"]
Rationale:
- Calculate the total milligrams of amoxicillin needed for the entire prescription.
Given:
Ordered dose is 250 mg.
Frequency is three times a day (tid).
Duration is 7 days.
Total milligrams needed = 250 mg/dose × 3 doses/day × 7 days
= 5250 mg.
- Determine the concentration of the medication from the label.
The label states the concentration is 250 mg per 5 mL.
Concentration = 250 mg / 5 mL
= 50 mg/mL.
- Calculate the total volume in milliliters (mL) required for the prescription.
Total volume needed = Total milligrams needed / Concentration
= 5250 mg / 50 mg/mL
= 105 mL.
- Determine the amount to dispense based on the bottle size and dispensing instructions.
The label indicates that each reconstituted bottle contains 100 mL.
The total volume needed is 105 mL, which is more than what one 100 mL bottle contains.
The note states, "Partial bottles are not dispensed." Therefore, two bottles must be dispensed to provide the client with a full course of medication.
Amount to dispense = 2 bottles × 100 mL/bottle
= 200 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.4"]
Explanation
Calculation:
Ordered dose: 120 mcg
- Identify the medication concentration:
The label states the concentration is 300 mcg/mL.
- Calculate the volume to administer.
Volume (mL) = Desired Dose / Available Concentration
= 120 mcg / 300 mcg/mL
= 0.4 mL
Correct Answer is ["1.54"]
Explanation
Given values:
Total volume = 1,000 mL
Infusion rate = 650 mL/h
- Calculate the total time in hours using the formula:
Total time (h) = Total volume (mL) / Infusion rate (mL/h)
= 1,000 mL / 650 mL/h
= 1.53846 h
- Rounded to two decimal places
= 1.54 h.
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