To calculate the volume of Tramadol Hydrochloride injection needed to administer 80 mg, given the stock concentration of 50 mg in 2 mL, you can use the following formula:
\[ \text{Volume required (mL)} = \frac{\text{Desired dose (mg)}}{\text{Stock concentration (mg/mL)}} \]
- First, determine the stock concentration in mg/mL:
\[ \text{Stock concentration} = \frac{50 \text{ mg}}{2 \text{ mL}} = 25 \text{ mg/mL} \]
- Now, plug in the desired dose and stock concentration into the formula:
\[ \text{Volume required} = \frac{80 \text{ mg}}{25 \text{ mg/mL}} = 3.2 \text{ mL} \]
Therefore, you would fill in the prescription and stock as follows:
Prescription: 80 mg
Stock: 25 mg/mL
Thus, the required volume of the injection is 3.2 mL.