
3.	The order reads cloxacillin 75 mg IM QID. The recommended dose for children is 10-45 mg/kg per day in divided doses. The patient weighs 24 lb.	Cloxacillin is supplied as 150 mg per mL. How many mL will be drawn up for a single dose? 


To solve this, we can follow these steps:

1. **Convert the patient's weight** from pounds (lb) to kilograms (kg) since the dosage is given in mg/kg.
   \[
   1 \, \text{lb} = 0.454 \, \text{kg}
   \]
   So,
   \[
   24 \, \text{lb} \times 0.454 \, \text{kg/lb} = 10.896 \, \text{kg} \approx 10.9 \, \text{kg}
   \]

2. **Calculate the recommended daily dose** based on the patient's weight. The range is 10-45 mg/kg per day. Since the order is for 75 mg per dose, which is a fixed dose, we don’t need this range for calculating how much to draw up.

3. **Determine how much of the solution is needed for each dose**. Since cloxacillin is supplied as 150 mg/mL, we can use a ratio to find the volume required for 75 mg:
   \[
   \frac{150 \, \text{mg}}{1 \, \text{mL}} = \frac{75 \, \text{mg}}{x \, \text{mL}}
   \]
   Solving for \( x \):
   \[
   x = \frac{75 \, \text{mg} \times 1 \, \text{mL}}{150 \, \text{mg}} = 0.5 \, \text{mL}
   \]

So, for each dose, you will need to draw up **0.5 mL**.

---

Would you like further details or have any questions?

Here are 5 related questions:
1. How would you calculate the total daily dose for this patient?
2. What is the maximum dose the child can receive based on the recommended range?
3. How does the dosing schedule change if the weight changes?
4. Why is it important to divide the total daily dose into equal parts?
5. How do you convert other medication concentrations to appropriate doses?

**Tip:** Always verify the concentration and dosing unit (mg/mL) before administering injectable medications.

The order reads cloxacillin 75 mg IM QID. The recommended dose for children is 10-45 mg/kg per day in divided doses. The patient weighs 24 lb. Cloxacillin is supplied as 150 mg per mL. How many mL will be drawn up for a single dose?

Learn how to calculate the correct dose of cloxacillin for a 24 lb child. This problem involves converting weight from pounds to kilograms and using proportions to determine how many mL to draw up from a 150 mg/mL solution for a 75 mg dose. Suitable for Grades 9-12.

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