Question

A patient is prescribed 80 mg of Tramadol Hydrochloride injection. The stock dose is 50mg / 2 mL. What volume will you require?fill this in..

Prescription.
_________ x ml = ?
Stock

80mg
___________ x 2 ml =
50mg

answer?

Answer 1

To calculate the required volume of the stock solution needed to obtain 80 mg of Tramadol Hydrochloride, you can use a proportion based on the stock concentration.

1. **Understand the Stock Concentration**:
- The stock concentration is 50 mg in 2 mL.

2. **Calculate the amount of volume needed for 80 mg**:
- Set up the proportion based on the stock solution:
\[
\frac{50 \text{ mg}}{2 \text{ mL}} = \frac{80 \text{ mg}}{x \text{ mL}}
\]

3. **Cross-multiply to find x**:
\[
50 \text{ mg} \cdot x \text{ mL} = 80 \text{ mg} \cdot 2 \text{ mL}
\]

This becomes:
\[
50x = 160
\]

4. **Solve for x**:
\[
x = \frac{160}{50} = 3.2 \text{ mL}
\]

**Final Prescription Fill**:

Prescription.
**3.2 mL** x ml = ?
**Stock**
80 mg
_____________ x 2 ml =
50 mg

So you will require **3.2 mL** of the stock solution to provide the prescribed 80 mg of Tramadol Hydrochloride.