For an order of 4 mg of dexamethasone (Decadron) IV push in a vial of 10 mg/mL, how many mL should be administered?

To determine how many milliliters of dexamethasone to administer, you need to compare the ordered dose with the concentration provided in the vial.

The vial contains dexamethasone at a concentration of 10 mg/mL. For an order of 4 mg, you can use the following formula:

Amount to administer (mL) = Ordered dose (mg) / Concentration (mg/mL)

Using the provided values:

Amount to administer = 4 mg / 10 mg/mL = 0.4 mL

This calculation shows that to achieve the ordered dose of 4 mg using a drug concentration of 10 mg/mL, the nurse should administer 0.4 mL. Thus, the correct answer reflects the precise measurement needed to meet the administration requirement for the patient.