If a patient requires 36mg of medication and the available concentration is 12mg/mL, how many mL should be administered?

To determine how many mL should be administered, divide the total required dosage by the concentration available. In this case, the patient needs 36 mg of medication, and the available concentration is 12 mg/mL.

The calculation involves taking the required dose of 36 mg and dividing it by the concentration of 12 mg/mL:

36 mg ÷ 12 mg/mL = 3 mL.

This means that in order to deliver the required dose of 36 mg, 3 mL of the solution needs to be administered. Therefore, the correct answer is 3 mL.