Question

The physician prescribed 4 mg IM of a medication. The medication is available as a powder in a 50 mg vial. Reconstitute it with 5.0 ml of water. Solution concentration yields 10 mg per ml. How many mls do you give?

Answer 1

ANSWER.

* Calculation of volume (ml) of drug required.

Formula

       Volume(ml) = Desired dose(D)/Dose in hand(H) * Quantity(Q).

   Here

       Desired dose(D) = 4 mg.

       Dose in hand(H) = 10 mg.

            Quantity(Q) = 1 ml

As per above formula

Volume(ml) of drug required = D/H * Q

                                                 = 4/10 * 1

                                                 = 0.4 ml.