Drug Calulation Problem

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Please help me set this problem up...I am going blank and am not near any guides.:uhoh3:

Give 0.4cc, supplied 5mg/1cc, if 0.4cc is given, how many mg is that? now I can basically eye the answer, but how would this be set up to solve? Thank you so much!:-)

Specializes in Acute Care, Rehab, Palliative.

5mg divided by 0.4 = 2mg

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Really, thank you everyone....now, I see....I was setting it up wrong, wrong....my brain has just thawed...lol

hugs to you all!

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Specializes in pediatrics, public health.
no, it's not my homework! and if someone asks for help, either don't answer and maybe keep the not so nice comments to yourself! Geez, just be gracious!:)

You're absolutely right. I apologize.

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This is how I would set it up:

5mg/1cc=(x)mg/0.4cc

5mg(0.4cc)=1cc(xmg)

2=x

I know this may be simple to some, but always works.

That is the formula I always use and find it to be the easiest to remember :)

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To Loriangel--

Actually, 5 mg divided by 0.4 = 12.5 mg.

You meant smth different, no?

OP's originally stated problem seemed a simple mental problem requiring about 5 seconds, maybe.

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Specializes in ER.
and thank you, to those who have answered. :)

I always use "desired over have" - always. D/H

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Specializes in Ltc, Hospice, Spinal Cord.

This is the way I do it when it's not obvious:

0.4cc/1cc * 5mg = 2mg

Simplest way I've found.

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The previous 2 posts used the same formula that I like to use as well. It's easy to remember and it always works. Find some sample questions online somewhere and try it out :)

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