Anurse practitioner prepares an injection of promethazine, an antihistamine used to treat allergic rhinitis. if the stock bottle is labeled 25 mg/ml and the order is a dose of 14.5 mg , how many milliliters will the nurse draw up in the syringe?

Answer : 0.58 mL will the nurse draw up in the syringe.

Explanation :

As we are given that the stock bottle labelled 25 mg/mL. Now we have to calculate the amount will nurse draw up in the syringe.

As, 25 mg dose present in = 1 mL

and, 1 mg dose present in =

So, 14.5 mg dose present in =

                                               = 0.58 mL

Therefore, 0.58 mL will the nurse draw up in the syringe.

the product of the pressure and volume is also constant