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It looks like you've uploaded an image related to pediatric dosing calculations. The image includes a question about calculating the **Safe Dose Range (SDR)** for a medication, along with instructions on determining if the dose range is safe, and calculating the amount to be administered for each dose.

### Here's a step-by-step breakdown of what I see in the image:

1. **Ordered Medication**: Epivir solution (lamivudine), 18 mg PO (orally) tid (three times a day) for a baby with an HIV infection.
   
2. **Patient's Weight**: 20 lbs (it says to hint-change this to kg, so we convert this to kilograms).
   
   - Conversion: \( 20 \, \text{lbs} \div 2.2 = 9.09 \, \text{kg} \) (approximately).
   
3. **On Hand**: Epivir oral solution, 10 mg/mL.

4. **Safe Dose Range (SDR)** for children weighing less than 50 kg: **2 mg/kg per dose**, divided every 8 hours (q8hr).

5. **High SDR**: There’s a notation of **4 mg/kg** for the high safe dose range.

### Calculations:

- **Low SDR**:
  \[
  \text{Low dose range} = 2 \, \text{mg/kg} \times 9.09 \, \text{kg} = 18.18 \, \text{mg}
  \]

- **High SDR**:
  \[
  \text{High dose range} = 4 \, \text{mg/kg} \times 9.09 \, \text{kg} = 36.36 \, \text{mg}
  \]

So the safe dose range is **18.18 mg to 36.36 mg** per dose.

The **ordered dose** is 18 mg, which falls within the safe dose range.

### Dose to Administer:

Since the available solution is **10 mg/mL**, to administer 18 mg, we calculate the required volume:

\[
\text{Volume} = \frac{\text{Ordered Dose}}{\text{Concentration}} = \frac{18 \, \text{mg}}{10 \, \text{mg/mL}} = 1.8 \, \text{mL}
\]

Thus, **1.8 mL** should be administered for each dose.

Would you like further details on this or help with other sections?

### 5 Related Questions:
1. How do you determine the safe dose range for medications in pediatric patients?
2. What is the significance of dividing doses q8hr for certain medications?
3. How do you convert pounds to kilograms in medical dosing calculations?
4. What happens if a prescribed dose falls outside the safe dose range?
5. Why is it important to calculate both the low and high end of the safe dose range?

### Tip:
Always verify the patient's weight in kilograms before calculating drug dosages, as dosing is weight-based in pediatric cases.

Calculate the Safe Dose Range (SDR) for Epivir solution (lamivudine) and determine if the dose ordered is safe for a child weighing 20 lbs.

Learn how to calculate the Safe Dose Range (SDR) for Epivir solution (lamivudine) in a pediatric patient weighing 20 lbs. This includes converting weight from lbs to kg, determining the low and high safe dose ranges, and calculating the correct volume to administer.

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