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

Answer 1

To find out how much volume of the tramadol stock solution is needed for an 80 mg dose, we can set up the equation using a proportion based on the stock concentration.

Given:
- Stock concentration: 50 mg in 2 mL
- Required dose: 80 mg

The equation can be set up as follows:

\[
\frac{80 \text{ mg}}{x \text{ mL}} = \frac{50 \text{ mg}}{2 \text{ mL}}
\]

Cross-multiplying gives:

\[
80 \text{ mg} \times 2 \text{ mL} = 50 \text{ mg} \times x \text{ mL}
\]

\[
160 = 50x
\]

Now solve for \( x \):

\[
x = \frac{160}{50} = 3.2 \text{ mL}
\]

Therefore, you will need **3.2 mL** of the tramadol hydrochloride injection to achieve a dose of 80 mg.