dosage calculation question...

[Jessicias85]

I am working on some homework and the question is as follows.

1g of Biaxin is ordered. Each tablet contains 250mg. How many tablets should be administered?

If my math is correct 4 tablets should be given. the answer key says 2.

Am I wrong or is the book?

[jill1188]

You are definitely right, it is 4 tablets.

1 gram = 1000 mg. Each tablet is 250mg...

1g x 1000mg/1g x 1 tab/250mg = 4 tablets

(:

[CoffeePlease]

Does the question also say how many tablets should be administered per dose if 1g per day, in 2 doses? If that's the case, then 2 tablets per dose would be correct.

[Jessicias85]

no, there is no designation of how many doses it which it is to be administered. It is just asking for how many tabs are needed to achieve 1g

[Double-Helix, BSN, RN]

The recommended adult dose of Biaxin is 500mg twice daily. Perhaps the instructor wants you to look up the correct dosages and base your answer on safe dosing as well as the math?

Either that, or whoever wrote the book made a mistake.

[LadyinScrubs, ASN, RN]

i am working on some homework and the question is as follows.

1g of biaxin is ordered. each tablet contains 250mg. how many tablets should be administered?

if my math is correct 4 tablets should be given. the answer key says 2.

am i wrong or is the book?[/quote]

welcome to book errors. i have seen so many books with similar errors. you would think that the publisher or the author would have the errors fixed after a book is in its 3rd or more edition. last semester we had to use pharmacology for nurses: a pathophysiologic approach and we had to buy the corresponding website called mynursinglab. they were both published by pearson and pearson does a horrible editing job. there were so many errors in each chapter and on the tests, that it was a severe problem. it appears that pearson books have a higher percentage of errors than others...but other books have errors. some more, some less.