For an order of 0.2 mg to be given subcutaneously with a concentration of 0.4 mg/mL, how much should be drawn?

To determine how much should be drawn for a subcutaneous injection of 0.2 mg at a concentration of 0.4 mg/mL, it's important to perform a calculation based on the given concentration.

The concentration of the medication is 0.4 mg/mL, which indicates that each milliliter of solution contains 0.4 mg of the drug. To find out how many milliliters are needed to obtain 0.2 mg, you set up the following proportion:

0.4 mg/mL = X mL/0.2 mg.

By solving for X, you can rearrange the equation to:

X = 0.2 mg / 0.4 mg/mL = 0.5 mL.

Therefore, the amount that should be drawn from the vial is 0.5 mL. It is also important to note that 0.5 mL is equivalent to 0.5 cc, as both units measure the same volume. Hence, the correct answer aligns with the requirements of the dosage and concentration provided. This clear relationship between dosage and concentration highlights the necessary calculations for accurate medication administration.