Question

A nurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. If the stock bottle is labeled 20. mg/mL and the order is a dose of 10.0 mg , how many milliliters will the nurse draw up in the syringe?

Answer 1

`d=20(mg)/(mL)\\ m=10mg\\ V=?\\\\ d=(m)/(V) \ \ \ \ \Rightarrow \ \ \ \ V=(m)/(d)=(10mg)/(20(mg)/(mL))=0,5mL`

Nurse will draw up 0,5mL in the syringe.

Answer 2

0.5 milliliters will the nurse drew up in the syringe

Step-by-step explanation:

Stock bottle is labeled 20 mg/mL

In 1 mL of the solution there are 20 mg of the promethazine.

Volume of medicine required for the 10.0 mg of the dose.

`(1)/(20 mg)* 10.0 mg = 0.5 mL`

0.5 milliliters will the nurse drew up in the syringe