Dosage Calculation RN Fundamentals Assessment 3.0 Practice Test 2026 – The All-in-One Guide for Exam Success!

To determine the correct number of teaspoons for 20 mL of codeine oral solution, it’s important to know the conversion between milliliters and teaspoons.

1 teaspoon is equivalent to approximately 5 milliliters. To convert milliliters to teaspoons, you divide the number of milliliters by the number of milliliters in one teaspoon.

So, for 20 mL:

- You take 20 mL and divide it by 5 mL/tsp, which equals 4 teaspoons.

This calculation aligns with the requirement for the patient and confirms that 20 mL corresponds to 4 teaspoons. Therefore, administering 4 teaspoons is accurate and supports proper dosing of the medication.