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Order: 400 mg. Cefazolin I.V. Available: Cefazolin 500 mg powder to be diluted with 5 mL...

Order: 400 mg. Cefazolin I.V. Available: Cefazolin 500 mg powder to be diluted with 5 mL of sterile saline How many mL will the nurse administer?

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Answer #1

Formula applies:

Strength X Volume of stock solution

                                        ------------------------------------------------      =     Volume required

Stock strength

400 mg

                                ---------------- X 5 ml    = 4 ml

500 mg

Volume of Cefazolin should the nurse administer is 4 ml.

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