dosage calculation question

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I want to make sure I am understanding this correctly. Am I doing this correctly??

ORDER: VANCOMYCIN 0.5G IV Q12H FOR AN ADULT PATIENT

AVAILABLE: 500 MG/VIAL

Preparation and stability

At the time of use, reconstitute by adding either 10 mL of Sterile Water for Injection to the 500-mg vial sterile vancomycin powder. FURTHER DILUTION IS REQUIRED.

After reconstitution with Sterile Water for Injection, 5% Dextrose Injection, or 0.9% Sodium Chloride Injection, the vials may be stored in a refrigerator for 14 days without significant loss of potency.

Reconstituted solutions containing 500 mg/10 mL must be further diluted with at least 100 mL of suitable infusion solution. The desired dose, diluted in this manner, should be administered by intermittent intravenous infusion over a period of at least 60 minutes.

What is the dose strength of the reconstituted vancomycin?

would it be 500mg/110ml because we are reconstituting with 10ml of sterile water and we are required to add an additional 100ml.

How many mL will you administer/ dose?

0.5g * 1000mg/1g = 500mg

500mg*110ml/500mg =110ml

110 ml

i dont believe this is correct

[...]

i dont believe this is correct

Why do you think this is incorrect?

Specializes in SICU, trauma, neuro.

How much Vanco is ordered? How much did you reconstitute, and how much did you use to reconstitute it? ;)

Specializes in Med-Tele; ED; ICU.

Of course it's correct.

0.5g = 500mg

You had 500 mg in 10 mL and then added another 100 mL to end up with 500 mg in 110 mL.

Specializes in NICU, RNC.

Yep, as the other already said: You ARE correct! :D

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