The physician orders promethazine (Phenergan) 25 mg intramuscularly for a patient with nausea. The bottle of promethazine is labeled "50 mg per mL". How much of the drug should be administered to the patient?

Question

Quizplus · Accepted Answer

To administer 25 mg of promethazine when the concentration is 50 mg per mL, you divide the desired dose (25 mg) by the concentration (50 mg/mL), resulting in 0.5 mL.

The Physician Orders Promethazine (Phenergan) 25 Mg Intramuscularly for a Patient