Question

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

Prescription
_________ x ml = ?
Stock

80mg
___________ x 2 ml =
50mg

answer?

Answer 1

To determine the volume required for an 80 mg dose of Tramadol when the stock concentration is 50 mg per 2 mL, you can set up a proportion based on the stock concentration.

1. **Identify the stock concentration**:
- 50 mg is present in 2 mL.
- Thus, the concentration is \( \frac{50 \text{ mg}}{2 \text{ mL}} = 25 \text{ mg/mL} \).

2. **Determine the volume required for 80 mg**:
- If the concentration is 25 mg/mL, we need to find out how many mL are required for 80 mg.
- Set up the equation based on the concentration:
\[
\text{Volume (mL)} = \frac{\text{Desired Dose (mg)}}{\text{Concentration (mg/mL)}}
\]
- Substituting the values:
\[
\text{Volume} = \frac{80 \text{ mg}}{25 \text{ mg/mL}} = 3.2 \text{ mL}
\]

Therefore, you will require **3.2 mL** of Tramadol Hydrochloride injection to administer an 80 mg dose.