Calculate the dosage in mL if the order is for 250 mg of medication that comes in a concentration of 100 mg/mL.

To determine the correct dosage in mL for the medication, you can use the formula that relates dosage, concentration, and volume:

[ \text{Volume (mL)} = \frac{\text{Desired Dose (mg)}}{\text{Concentration (mg/mL)}} ]

In this case, the desired dose is 250 mg, and the concentration of the medication is 100 mg/mL.

Plugging in the values gives:

[ \text{Volume (mL)} = \frac{250 \text{ mg}}{100 \text{ mg/mL}} ]

When you perform the division:

[ \text{Volume (mL)} = 2.5 \text{ mL} ]

Thus, the correct dosage to administer is 2.5 mL. This aligns with the concentration provided, as for every 100 mg of medication, there is 1 mL of solution. Therefore, to achieve a total of 250 mg, you indeed need 2.5 mL of the solution.