Evolve HESI Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

A healthcare provider prescribes morphine sulfate 4mg IM. Morphine is available in 8 mg per ml. How many ml should the nurse administer?

0.25 ml

0.5 ml

To determine the correct volume of morphine sulfate to administer, it's essential to apply the formula for calculating medication dosages. The prescription indicates a need for 4 mg of morphine. Given that the concentration of morphine is 8 mg/mL, you can set up the calculation as follows:

1. Identify the dose ordered and the available concentration:

- Ordered dose: 4 mg

- Available concentration: 8 mg/mL

2. Use the formula:

- Required volume (mL) = (Desired dose / Concentration of stock solution)

3. Plugging in the values:

- Required volume (mL) = 4 mg / (8 mg/mL)

When you perform the calculation:

4 mg divided by 8 mg/mL equals 0.5 mL.

This means the nurse should administer 0.5 mL of morphine sulfate to deliver the prescribed dose of 4 mg effectively. Thus, the selection of 0.5 mL aligns with the calculation and accurately reflects the dosage needed based on the available concentration.

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