A nurse prepares to administer meperidine 35 mg IM, with available medication at 75mg/mL. How many mL should be administered per dose?

To determine how many milliliters of meperidine should be administered, it's necessary to calculate the volume based on the concentration of the medication available.

First, you need to understand that the concentration provided is 75 mg/mL and you need to administer a dose of 35 mg. To find out how many mL to administer, you can use the formula:

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

Substituting the known values into the formula gives:

[ \text{Volume (mL)} = \frac{35 \text{ mg}}{75 \text{ mg/mL}} = 0.4667 \text{ mL} ]

Rounding this value to a sensible number for administration, 0.47 mL can be rounded to 0.5 mL, as medications typically are rounded to the nearest 0.1 mL for accuracy and practicality in administration.

Thus, administering 0.5 mL accurately corresponds to the required dosage of 35 mg based on the available concentration of the medication. This reasoning justifies the conclusion that the correct answer is