Question

A multidimensional vial of methotrexate has been reconstituted to yield 2.5 mg/mL. How many mL of the medication is required if the patient is to receive 15 mg per day?

a) 4 mL
b) 5 mL
c) 6 mL
d) 7 mL

Answer 1

To administer a 15 mg dose of methotrexate from a solution with a concentration of 2.5 mg/mL, the patient requires 6 mL of the solution.

Step-by-step explanation:

To calculate the volume of methotrexate needed, we can use the formula:

Volume needed = Desired dose / Concentration.

In this case, the desired dose is 15 mg and the concentration of the reconstituted methotrexate is 2.5 mg/mL. By substituting these values into the formula, we get:

Volume needed = 15 mg / 2.5 mg/mL = 6 mL.

Therefore, 6 mL of the medication is required for the patient to receive a 15 mg dose.