Question

The order reads to give Penicillin 250,000 units IVPB (IV Piggyback). The nurse has a vial...

The order reads to give Penicillin 250,000 units IVPB (IV Piggyback). The nurse has a vial of penicillin powder that will yield 300,000 units/mL when reconstituted with 30 mL of sterile water. How much will you give?

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Answer #1

The formula for calculating Penicillin drug is D / H x V = amount to give.

D = desired dose( ordered by the doctor) H= on hand dose ( drug dose on the label of the drug container) V= vehicle ( form and amount in which the drug comes). Here, the doctor ordered to give 250,000 units of Penicillin injection IV , the drug on hand = 300,000 units, for reconstitution or dilution = 30ml of sterile water. So, according to the formula (D/H x V= AMOUNT TO GIVE)   

250000/300000 x 30 = 0.833 x 30 = 25ml. So, the nurse should administer 25 ml of Penicillin injection as IV to the patient.

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