Drug Calulation Problem

[juzme]

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

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!:-)

[loriangel14, RN]

5mg divided by 0.4 = 2mg

[juzme]

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

hugs to you all!

[noahsmama]

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.

[Mommy2NQ]

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 :)

[chorkle]

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.

[MassED, BSN, RN]

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

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

[jjnmrsmom]

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

0.4cc/1cc * 5mg = 2mg

Simplest way I've found.

[beauty912]

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 :)