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:
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Determine the concentration of the stock solution:
- 50 mg is in 2 mL.
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Calculate the concentration in mg/mL: \[ \text{Concentration} = \frac{50 \text{ mg}}{2 \text{ mL}} = 25 \text{ mg/mL} \]
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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.
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