A vial of medication contains 10 mg/mL. How many mL are needed for a 50 mg dose?

To find out how many milliliters are needed for a 50 mg dose of medication that has a concentration of 10 mg/mL, you can use a simple calculation.

First, determine the amount of medication present in each milliliter: the vial has a concentration of 10 mg for every 1 mL. To calculate the volume required for a 50 mg dose, use the formula:

Volume (mL) = Desired Dose (mg) / Concentration (mg/mL).

Plugging in the values:

Volume (mL) = 50 mg / 10 mg/mL = 5 mL.

This means that to obtain a total of 50 mg of the medication, you need to take out 5 mL from the vial. This reasoning clearly demonstrates why the correct answer is 5 mL.