Question

the home health nurse is to administer 0.5mg of vitamin b12 1000 mcg/ml intramuscular injection daily for 5 days. the drug supply available is a 30ml containing vitamin b12 1000 mcg/ml.how many milliliters should the nurse draw up in the syringe?

Answer 1

ANSWER : 2.5 ml.

It is to be administered 0.5 mg means 500 mcg of vitamin B12 for daily.

So, in 5 days vitamin B12 is to administer = 500 × 5 = 2500 mcg.

(As, 1 mg = 1000 mcg.)

Now, vitamin B12 intramuscular 1000mcg/ml

means ,

1000 mcg of vitamin B12 present in 1 ml of injection.

1 mcg of vitamin B12 present in (1/1000) ml of injection

So, 2500 mcg of vitamin B12 present in (1/1000)× 2500 = 2.5 ml of injection.

Now, injection is to be drawn in syringe daily = 2.5/5 = 0.5 ml

So, The nurse will draw 2.5 ml in syringe for total 5 day .