# MATH>>Help please.. If i dont pass this class I wont get to start clinical!!!!!

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1)you must give 750mg of ASA. You have a 40z bottle contaiing gr. V per tsp. How many drams will you give?

2)You must give 7500 units of heparin sc. on the medication cart there are three vials. the first one is label 100 units/ml. the second label reads 1000 units/ml. the last label reads 20,000 units/ml. calculate hos much you would give each bottle.

3)give 0.25 g of tylenol. you have a solution of gr ii per 5cc. how many mL will you administer?

4)Give 2 g of amoxicillin per day in 4 equally divided doses. you have a bottle containing 250 mg per dram. 1)how many grams or illigrams will you give each dose? 2) how many cc will you give in each dose?

7,015 Posts

this is a lot to ask in one post, at least show us your initiative and how far you can get on your own......also, are you in a USA school? i mean really, DRAMS???

226 Posts

that is a good question do you go to a us school? what guidelines or resources has your school recommended for you to learn this math?

i attended us schools and though we encountered drams in our reading we were not responsible for working out dosage calculations with drams. i did do a search online for this type problem and found 1-2 problems at a couple us schools though.

also which method of doing math do you use?

formula method?

ratio and proportion method?

or dimensional analysis method?

i prefer dimensional analysis method but then again it is best to work out the problems with the method you already are comfortable with rather than learning a new method while struggling with the math.

here are some websites and info that may help you with these problems.

website for nursing math

http://www.msumedcalc.com/quiz1.html

has drams and has great examples of dimensional analysis probs.

look in conversions and see examples of how to perform dimensional analysis problems

look in measurements and see that 1dr = 4ml which is the conversion factor needed to convert something from drams to mls or mls to drams

http://ts.nist.gov/weightsandmeasures/household.cfm

the top line of this document shows dram conversion factors or equivalencies.

to do dimensional analysis i always "determine the unit the answer needs to be". "then begin with that unit on top" (for your first problem the starting unit would be drams because that is what you want your answer to be in) and plug in any other factors i need from the math word problem and any other conversion factors i need then when i cross off the like names of units i am left with the unit i want for my answer. then do the math across and reduce it and you have your numerical answer to go with your unit.

the second #2 problem you listed above is a fairly simple problem. if you understand the math this can practically be done in your head.

as morte stated "at least show us your initiative and how far you can get on your own". we can help you best when we know what you already understand and what method of problem solving you use, so we are not reteaching you what you already know or explaining it in a method that confuses you.

best of luck.

10 Posts

1)you must give 750mg of ASA. You have a 4-oz bottle containg gr. V per tsp. How many drams will you give?

I know I need to give 750mg of ASA. I'm not sure whats important from here.. The part that messes me up is "per tsp" gr v = 300mg one dram is 4ml. I dont know where to go from here??

10 Posts

2)You must give 7500 units of heparin sc. on the medication cart there are three vials. the first one is label 100 units/ml. the second label reads 1000 units/ml. the last label reads 20,000 units/ml. calculate how much you would give from each bottle.

I think i have this one but i am unsure. 1) 0.75 mL 2)13 mL 3)2.6 mL

10 Posts

3)give 0.25 g of tylenol. you have a solution of gr ii per 5cc. how many mL will you administer?

I keep getting messed up with this one. gr 2= 120mg 0.25 g =250 mg at this point i keep going around and round cuz im not sure what to do. when does the per 5mL come in to play and how do i go from mg to mL.. i keep trying to work it out but i think my effort is making the confusion worse lol

10 Posts

4)Give 2 g of amoxicillin per day in 4 equally divided doses. you have a bottle containing 250 mg per dram. 1)how many grams or milligrams will you give each dose? 2) how many cc will you give in each dose?

not sure if i can explain what i did lol... 2g=2000mg / 250mg per one dram=

2000mg over xdram= 8dram

4ml times 8 dram = 2mL divided by 4 = 0.5mL /// cc and mL's are the same so it would still be 0.5cc?

10 Posts

here is another one that seems so easy but i keep getting blocked.

dr ordered keppra 1g po daily. you have 120tablet bottle of keppra labeled 500 mg per tab. how much should you give?

500mg over one tab = 1000mg over x tab = 2 tab

i dont know how to set up the 1g=1000mg ratio and perportion.. if that makes sense?

10 Posts

YES i am in the USA!

69 Posts

Ok I tried proble #4 b like this::

Drug available/volume available = drug ordered/volume to administer

assuming 1 dram equals 4 cc

250 mg/4 cc = 2000 mg/ cc to administer

32 cc = cc to admin.

But we got to divide that into 4 equal doses as question asks:

32cc/4 doses = 8cc per dose.

69 Posts

3)give 0.25 g of tylenol. you have a solution of gr ii per 5cc. how many mL will you administer?

I keep getting messed up with this one. gr 2= 120mg 0.25 g =250 mg at this point i keep going around and round cuz im not sure what to do. when does the per 5mL come in to play and how do i go from mg to mL.. i keep trying to work it out but i think my effort is making the confusion worse lol

I did like this :::

Drug available/volume available = drug ordered/volume to administer

120 mg/ 5 ml = 250 mg/ ml to admin

ml to admin = 250 mg/ 120 mg X 5 ml

ml to admin = 10 ml

10 Posts

seems so easy after its worked out lol thank you!!

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