Math Problem Procalc I cant seem to figure out!

[lina.561]

Tagamet (Cimetidine) is available in liquid form labeled 300 mg in 5 mL. 0.3 g of Tagamet has been prescribed PO. How many mL should you administer?

Can anyone help me out here, on the practice questions it says the answer is 5mL

But I dont see how. Can you let me know how you would figure this out?

Thank you in advance!

[nicoleRN831]

The easiest way to remember the metric conversion chart is to remember this saying...

King Henry Died By Drinking Chocolate Milk

The K is Kilograms

The H is Hectocrams

The D is dekagrams

The B is your base (grams)

The D is decigrams

The C is centigrams

The M is miligrams

So if your on the base uint of grams your going to move your decimal point over to to right 3 times.. If your on the mg and want to go to grams move the decimal over 3 spaces to the left...

and just remember if you need to get mcg then your going to add 3 more spaces to the right of the decimal in mg.

If your at grams and need to go to mcg then your going to move the decimal over 6 places to the right

Hope this helps you remember!! If you need extra help let us know and we will be glad to help!!

[lina.561]

Thank you-I wrote this down, But Hey I might sound dumb again here but if 0.3g= 300mg then is this true:

0.4g=400mg

0.5g=500mg and so on??

[nicoleRN831]

yea no matter what the dose in grams is just move that 3 spaces to the right to get mg. and move the mg to the left 3 spaces to get to grams

if you had 450 mg it would equal 0.45g

or if you had 2 grams that would equal 2000mg

[lina.561]

Wow thank you so much nicole831 and everyone else, it makes sense now- I really appreciate you guys!

[nicoleRN831]

No problem, I'm glad i could help.. If you have other math questions message me because I'm pretty good with math and wouldn't mind helping!!

[kty1]

okay well im just a cna and i want to get into the lpn program unlike many of you guys, this past week is the first time i have tried out these problems! i have to pass the procalc and yes i do have a metric conversion paper, that i'm trying to memorize. no my teacher is not teaching us this since its only a cna class. so with that being said i am new at all this, i have been doing lots of practice questions and i have been doing fairly well. you have to start some where!

thanks for solving the problem without sacarsim to those of you who did. :)

lina.561 :)

please know that the majority of nurses on allnurses.com would never respond to you in any other way but in a respectful manner. it embarrassed me to see the people who were disrespectful towards you. please do not hesitate to ask any of us any question. i'm proud that you have taken the steps to move forward in your career (and trying to work out the math). good for you and good luck.

[Susan Leech]

~

Tagamet (Cimetidine) is available in liquid form labeled 300 mg in 5 mL. 0.3 g of Tagamet has been prescribed PO. How many mL should you administer?

Can anyone help me out here, on the practice questions it says the answer is 5mL

But I dont see how. Can you let me know how you would figure this out?

Thank you in advance!

Here is how we figure these problems out using dimensional analysis.

xml= __5ml__ x 1000mg x 0.3g = 5ml

~ ~~300 mg ~~~1g

ignore the ~ marks, that is the only way I could post it and keep everything in line hope it helps!

[VickyRN, MSN, DNP, RN]

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