# The prescription is for 375 mg of an oral liquid medication. The medication available is 250 mg per 5 mL. How many mL should the nurse administer? Record the answer using one decimal place. Round only at the end of the calculation.

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> subject: Medication Administration  
> category: PPT

## Question

The prescription is for 375 mg of an oral liquid medication. The medication available is 250 mg per 5 mL. How many mL should the nurse administer? Record the answer using one decimal place. Round only at the end of the calculation.

Record your answer using one decimal place.

mL

Enter the number only. The unit is already shown. Round only at the end of the calculation.

Calculator

0

C⌫÷×
789−
456+
123=
0.Use rounded result

## Explanation

Multiply the prescribed-to-available dose ratio by the supplied volume: (375 mg ÷ 250 mg) × 5 mL = 7.5 mL.

## In-depth explanation

Quick answer
7.5 mL.
Set up
Volume to give = (prescribed dose ÷ available dose) × available volume.
Calculation
(375 ÷ 250) × 5 = 7.5. Enter the number only because mL is displayed separately.
**Sources**
- NCSBN — NCLEX Frequently Asked Questions: Calculation Items

- NCSBN — Prepare for the NCLEX

## Key concepts

- **Oral liquid concentration** — The medication amount supplied in a stated liquid volume.
- **Dose ratio** — The prescribed amount divided by the amount available.

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