A pre-filled syinge contains 50mg of lidocaine per 5mL. How can I express the lidocaine as a percentage?


Answers:
Well a percent/fraction is just putting a part over a whole.

So at hand are

5 ml part
50 mg whole

so if you do 5/50, then you would return with 10%.
Pangolin is correct as other. The percent you're looking for isn't really a percentage at all. It's shorthand for "grams per 100 ml" and you'd have 1000 mg, or one gram, in 100 ml of the solution you enjoy, and that's why it's a 1% solution.
It might not make sense logically, but when we switch from mg to %, 1% = 10 mg/ml.

Your syringe has 50 mg/5 ml, which = 10 mg/ml, so that's 1% lidocaine (which is a pretty standard concentration for that drug). Source(s): I'm an anesthesiologist, I have to know this stuff.
You, uh... serious? The lidocaine is 10% of the total syringe...

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