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


whats the prescription?

Answer 1

To determine the volume of Tramadol Hydrochloride injection needed to deliver a dose of 80 mg, given that the stock concentration is 50 mg per 2 mL, you can set up a proportion based on the stock solution.

First, you need to find out how many mL you need for 80 mg:

1. Determine the concentration of the stock solution:
- 50 mg is in 2 mL.

2. Calculate the concentration in mg/mL:
\[
\text{Concentration} = \frac{50 \text{ mg}}{2 \text{ mL}} = 25 \text{ mg/mL}
\]

3. Now, to find out how many mL you need for 80 mg:
\[
\text{Volume} = \frac{\text{Desired dose}}{\text{Concentration}} = \frac{80 \text{ mg}}{25 \text{ mg/mL}} = 3.2 \text{ mL}
\]

So, the prescription can be expressed as:

**Prescription**
\[
80 \text{ mg} \, \, \text{x mL} = \, \, \, \text{Stock} \, (25 \text{ mg/mL})
\]

Thus,

\[
80 \, \text{mg} \, \, = \, \, \, 25 \text{ mg/mL} \times 3.2 \text{ mL}
\]

Therefore, you will require **3.2 mL** of the stock solution for the prescription.