Nursing Students General Students
Published Sep 23, 2007
tiffany311
126 Posts
I am struggling with this conversion and then I get a really tough question such as this,
here is the problem:
You are to administer Trazadone 450 mg po. The available unscored tablets are 200,100,50, and 25 mg. How many tablets and of which strength should you administer?
another question- can someone please explain all about conversion?Sadly I don't have a clue about how to do this sort of thing:(
Thank you for all your kindness in helping me out:o
Bonny619
528 Posts
Hmm, I have never had a question like that but I would give 2, 200's and 1, 50.
ray2512
59 Posts
Your freeking out, calm down. Think of it as apples. you need 400 apples, there are boxes of 200, 100, 50, and 25.
so you need 2 boxes of 200 and one box of 50
does that help
and by the way thats a lot of trazadone!
CT Pixie, BSN, RN
3,723 Posts
You always want to try and give the least amount of pills as possible.
so you'd go for 2 200mg and 1 50mg..NOT 4 100's and 1 50mg etc
As for conversions first you have to know bigger to smaller for example:
k, g, mg, mcg. Then you take what you are converting from..say you need to convert from grams to milligrams. Think of it like this: you are going from Larger to smaller..see that "L" in larger..its pointing you in the direction to move the decimal point. You move it 3 points for each size you are going. So with 25g you are going Larger to smaller and only one set of 3. So 25g=25000mg. If you were going g to mcg..you would move the decimal 2 sets of 3 so it would be 25g = 25000000mcg
Now say you need to convert 7500mg to grams..you are going a Smaller size to a larger..now look at that S..the S is pointing you in the direction to move the decimal point..to the left.
so its 7.5g
I hope that makes sense. I wish I could actually show you. But I always put my L and S at the top of the page. And I put my measurements L,ml, mcl and k,g,mg,mcg etc next to it
Daytonite, BSN, RN
1 Article; 14,604 Posts
The way to mathematically work this problem would be to divide 450 by the different strengths of tablets you have available.
There are multiple answers to this problem that would make it correct
Conversion is the change from one unit of measure to another.
DutchgirlRN, ASN, RN
3,932 Posts
You know, for this kind of a problem I would make a picture. Make four squares and label them "200", "100", "50", and "25". Think about what combinations of these you would use to come up with a total of 450. You are allowed to use multiples of the different squares.The way to mathematically work this problem would be to divide 450 by the different strengths of tablets you have available.450 divided 200 = 2.5450 divided 100 = 4.5450 divided 50 = 9450 divided 25 = 18There are multiple answers to this problem that would make it correctTwo 200 mg tablets + one 50 mg tabletTwo 200 mg tablets + two 25 mg tabletsFour 100 mg tablets + one 50 mg tabletFour 100 mg tablets + two 25 mg tabletsNine 50 mg tabletsEighteen 25 mg tablets
Simply you need 450 mg, The tablets are unscored so you cannot break them in half. You need to use as few as pills as possible. There is only one correct answer.
2 - 200 mg tablets, plus 1 - 50 mg tablet = 450 mg.