Question

q5. a physician orders 50 mg of an injectable solution. in stock is a vial of the solution with a dose strength of 125 mg/5 ml. what volume of the in - stock solution should be administered?

Explanation:

Step1: Determine the concentration

The concentration \(C=\frac{125\space mg}{5\space mL} = 25\space mg/mL\)

Step2: Use the formula \(V=\frac{D}{C}\)

where \(D = 50\space mg\) (desired dose) and \(C=25\space mg/mL\) (concentration). Then \(V=\frac{50\space mg}{25\space mg/mL}\)

Answer:

\(2\space mL\)