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Concentration Practice Question

by NANCY
(HOUSTON, TEXAS)

How much 1% lidocaine is needed to fill an order for 30 mg of lildocaine?

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Answer
by: Anonymous

3000
1% Lidocaine answer
by: Brad Wojcik, Pharm D

You are starting with 30 mg and have to change that to mL using the ratio of 1% w/v. 1% w/v means 1 g/100 mL, or 1000 mg/100 mL.

30 mg (100 mL/1000 mg) = 3 mL

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