Math Problem Procalc I cant seem to figure out!

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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?:confused:

Thank you in advance!

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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?:confused:

Thank you in advance!

Read the question again, carefully (I had to read it twice too).

You're giving 0.3 g, not 0.3 mg.

0.3 g = 300 mg

There are 300 mg in 5 mL, so give the whole 5 mL.

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Specializes in LTC.

0.3ml = 300mg

Amt. ordered/ Amt. available X strength = dose

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Specializes in M/S, MICU, CVICU, SICU, ER, Trauma, NICU.

Please review the Metric System so you can get used to it.

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Doesn't your teacher teach basic metric conversion changes?

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I think it was probably a matter of the OP not reading the question carefully enough.

And yes, a simple oversight as nurse can be dangerous, but that's why we go to school and do tons of practice problems and ask questions. Hopefully, this will help her remember to slow down and double check things in her daily practice so she can develop into a safe, competent nurse. Better on a homework question than on a patient!

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Specializes in Acute Care, Rehab, Palliative.

0.3g += 300mg. That is why you would give the whole 5 ml. You need to learn metric conversions for many dosage calculations.

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Specializes in Acute Care, Rehab, Palliative.
0.3ml = 300mg

Amt. ordered/ Amt. available X strength = dose

0.3 ml does not equal 300mg.

0.3g equals 300mg

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Specializes in LTC.
0.3 ml does not equal 300mg.

0.3g equals 300mg

you're right, i mis-wrote. i stand corrected.

** the formula,however, is right.

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Specializes in critical care; community health; psych.

Yes you need to know this but you will learn it. You did the right thing asking for help. And when someone asks you this question, you will help that person find the answer without an attitude.

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5 ml x 1000 mg x 0.3 g

300 mg 1 g

1500

300

5

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Specializes in Hemodialysis, Home Health.

moved to General Nursing Student Discussions forum :)

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