Question

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

Prescription 80mg
_________ x ml = ? ___________ x 2 ml =
Stock 50mg

80mg
___________ x 2 ml =
50mg

answer?

Answer 1

To determine the volume of the Tramadol Hydrochloride injection required to administer 80 mg, we can set up a proportion based on the concentration of the stock solution.

We know:
- Stock solution: 50 mg in 2 mL
- Desired dose: 80 mg

Using the formula:
\[
\text{Volume required (mL)} = \left(\frac{\text{Desired Dose (mg)}}{\text{Stock Concentration (mg/mL)}}\right)
\]

First, we find the stock concentration in mg/mL:
\[
\text{Stock Concentration} = \frac{50 \text{ mg}}{2 \text{ mL}} = 25 \text{ mg/mL}
\]

Now, we can find the volume needed for 80 mg:
\[
\text{Volume required} = \left(\frac{80 \text{ mg}}{25 \text{ mg/mL}}\right) = 3.2 \text{ mL}
\]

So, the required volume is **3.2 mL**.