Question

The physician orders promethazine (Phenergan) 25mg 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

Answer 1

The patient should be administered 0.5 ml of promethazine intramuscularly.

Step-by-step explanation:

To determine how much of the drug should be administered to the patient, we need to calculate the volume of the drug based on the ordered dose and concentration.

Given that the bottle of promethazine is labeled '50 mg per ml', we can first convert the ordered dose of 25mg to a volume by dividing it by the concentration:

25 mg / 50 mg per ml = 0.5 ml

So, the patient should be administered 0.5 ml of promethazine intramuscularly.