Need Pharmacology help dealing w/math

i have a test tomorrow and she gave us a study guide but i'm so lost and have no idea how to figure the following out...if anyone can help i'd really appreciate it!!
1. Depakene 0.75 grams is prescribed. Depankene syrup is labeled 250mg per 5 mL.
Give____ mL
2. Dosage Available: Furoxone 50 mg per tbsp
Dosage ordered: Furoxone suspension 0.1 g po QID
Give____ mL 

Sep 12, '05Quote from HappychicHappychic, what would you think the first step should be?? You need to get "what you have" in the same unit as "what you need to give"....so convert the grams into milligrams.i have a test tomorrow and she gave us a study guide but i'm so lost and have no idea how to figure the following out...if anyone can help i'd really appreciate it!!
1. Depakene 0.75 grams is prescribed. Depankene syrup is labeled 250mg per 5 mL.
Give____ mL
2. Dosage Available: Furoxone 50 mg per tbsp
Dosage ordered: Furoxone suspension 0.1 g po QID
Give____ mL
Do that, and we'll talk about the next step 
Sep 12, '05Quote from truesnHappychic, what would you think the first step should be?? You need to get "what you have" in the same unit as "what you need to give"....so convert the grams into milligrams.
Do that, and we'll talk about the next step
Ok so if i convert the .75 grams to mg that would be 750 mg 
Sep 12, '05Then you would dose over stock times the vehicle.750 / 250 x 5. 750 divided by 250 =3. 3 x 5 = 15. You would give 15ml.


Sep 12, '05Or you can say..
250 mg 750 mg
______ = ______
5 mL x mL
cross multiply to get 250x = 3750.
you divide 250x by 250 to get x alone...remember, whatever you do to one side of the equation you have to do to the other side, so you would also divide 3750 by 250.
250x 3750
____ = ____
250 250
x = 15 mL (you know it's mL because you labeled the parts of the equation.
For the second one...
50 mg 100 mg
_____ = ______
1 tbsp x tbsp
cross multiply...50x = 100
divide 50 x by 50 to get the x alone, then divide 100 by 50...x = 2 tbsp
My way *seems* longer, but it's the way we were taught, and it's the one I feel comfortable with
Btw...nothing is lining up right...but it's the same as 50 mg/1 tbsp = 100 mg/x tbsp...etcLast edit by truern on Sep 12, '05 
Sep 12, '05Ooops! I read tsp instead of tbsp for number 2. should be 30 ml. I guess I would have got that one wrong. :chuckle

Sep 12, '05Quote from loriangel14Well, I didn't read the whole problem....my answer would have been counted *wrong* on a drug calc test :uhoh21:Ooops! I read tsp instead of tbsp for number 2. should be 30 ml. I guess I would have got that one wrong. :chuckle

Sep 12, '05Quote from truesnWell, I didn't read the whole problem....my answer would have been counted *wrong* on a drug calc test :uhoh21:
Ladies thanks so much!! 

Sep 12, '05Quote from loriangel14Did we help or confuse further? :chuckle
I was confused at first but i got it now 
Sep 12, '05That's my kind of help! I don't like for someone to just give me an answer, I want to be able to understand how, why, when, where, and what will happen next!
So, when I get to this point, I'll probably be posting for help too.
Good luck, happychic!