Question

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

80mg
___________ x 2 ml =
50mg

answer?

Answer 1

To calculate the volume required for 80 mg of Tramadol using the stock solution provided (50 mg in 2 mL), you can set up a proportion or use a simple formula.

**Step 1: Determine the concentration of the stock solution.**
- The stock solution is 50 mg in 2 mL, which means:
- 50 mg / 2 mL = 25 mg/mL

**Step 2: Calculate how many mL is required for 80 mg.**
- Using the concentration (25 mg/mL):

\[
\text{Volume required (mL)} = \frac{\text{desired dose (mg)}}{\text{concentration (mg/mL)}}
\]

\[
\text{Volume required (mL)} = \frac{80 \text{ mg}}{25 \text{ mg/mL}} = 3.2 \text{ mL}
\]

**Prescription Fill In:**
- To fill in the prescription formula:

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

Calculating the volume:
\[
\frac{80}{50} \times 2 = 3.2 \text{ mL}
\]

**Final Answer:**
3.2 mL of the Tramadol Hydrochloride injection is required.