Pediatric ATI Practice Exam

If a parent is instructed to give her child 240 mg of acetaminophen, and the label reads 160 mg/5mL, how much should she administer?

1. 1 tsp

2. 1 ½ tsp

3. 2 tsp

4. 2 ½ tsp

The correct answer is: 1 ½ tsp

To determine the correct dosage of acetaminophen, we need to calculate how many milliliters (mL) are necessary to achieve the required 240 mg. The concentration provided is 160 mg in 5 mL. First, we find out how many milliliters are needed to obtain 240 mg using the proportion based on the provided concentration. 1. Start by determining how many mg are in 1 mL: - 160 mg is contained in 5 mL, which means that each mL contains: \[ \frac{160 \text{ mg}}{5 \text{ mL}} = 32 \text{ mg/mL} \] 2. Next, calculate how many mL are needed for 240 mg: - Using the concentration of 32 mg/mL, we can set up the equation: \[ \text{Volume (in mL)} = \frac{\text{Required dose}}{\text{Concentration}} = \frac{240 \text{ mg}}{32 \text{ mg/mL}} = 7.5 \text{ mL} \] 3. Since there are 5 mL in