What is the required dose in mL of a medication when the patient requires 0.5 mg and the supplied concentration is 1 mg/mL?

To find the required dose in mL of the medication, you start with the prescribed amount that the patient needs, which is 0.5 mg. You also have the concentration of the supplied medication, which is 1 mg/mL.

To calculate the volume needed to obtain the required dose, you can use the formula:

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

In this case, you plug in the values:

Volume = 0.5 mg ÷ 1 mg/mL = 0.5 mL.

Thus, the correct answer indicates that to administer the required dose of 0.5 mg, you need to give the patient 0.5 mL of the medication, considering the concentration you have on hand. This calculation is essential for ensuring that patients receive the correct amount of medication safely.