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 a 25 mg dose of promethazine when the concentration is 50 mg per 1 mL, you divide the desired dose (25 mg) by the concentration (50 mg/mL), resulting in 0.5 mL to be administered.

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