drug computation.. help!

Okami_CCRN, BSN, RN · Apr 28, 2014

Remember that the formula is dose ordered/dose on hand multiplied by volume/tabs.

So for number one you have .325mg/.250mg x 1 tab = 1.3 tab. Your book may have keyed that incorrectly. A way to check is see how much smaller or bigger your dose on hand is. In this case .250 is less than .325 so you know you're going to need at least 1 tab to get there.

Convert 50lbs to kg, 50lbs/2.2= 22.72. then multiple 5mg x 22.72= 113.75. Now you can continue with the formula, 113.75mg/125mg x 1ml = .91ml

smf0903 · Apr 28, 2014

I get 0.3mL for the second problem.

lucypill0229 · Apr 28, 2014

Hi okami i came up with the same answers but i'm just wondering why they are not included in the choices which makes me crazy like ___.

smf0903 · Apr 28, 2014

I am curious as to why you're getting 0.91mL for the second problem? If it's three divided doses wouldn't the admin amount be 0.3mL? (And it drives me crazy too when stuff is keyed wrong...though I understand things happen!)

chare · Apr 28, 2014

Are you sure that you copied the questions correctly, as none of the answer choices you have provided are correct.

**NICU Guy, BSN, RN** · Apr 28, 2014

I am assuming that the second problem should be 50 kg instead of 50 pounds. Unless your giving a pediatric patient Dilantin.

5 X 50= 250

250/ 125= 2mL per day

2/ 3= 0.67 mL

not one of the choices

Esme12, ASN, BSN, RN · Apr 28, 2014

You need to check the questions...I think you typed something wrong.

RubberDuckieLove · Apr 28, 2014

Yeah....... none of the given choices are correct. I hate it when that happens.

lucypill0229 · Apr 28, 2014

To everyone: yeah i made sure i copied it correctly. I was thinking about it and wonder why its none of the choices.. anyway thanks for your effort guys. At least i know i'm not the only one who came up with a different answer.

Esme12, ASN, BSN, RN · Apr 29, 2014

As far as I am concerned the answers are not in the choices.....check with your instructor...if she says the answer is there let us know how she figured the problem.

Guests · May 1, 2014

OP, regardless of what choices appear and what the answer key says, the correct answers to the questions posed are as noted below. Any deviation from the answers that I've provided are either an error of transcription or an error of calculation.

Question 1: Answer = 1.5 tablets (as shown below)

[TABLE=width: 253]

[TR]

[TD=align: center][/TD]

[TD=align: center]1 tab[/TD]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center]0.375 mg[/TD]

[TD=align: center]x[/TD]

[TD=align: center]----[/TD]

[TD=align: center]=[/TD]

[TD=align: center]1.5 tab[/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[TD=align: center]0.25 mg[/TD]

[TD=align: center][/TD]

[/TR]

[/TABLE]

Question 2: Answer = 0.9 mL (as shown below)

[TABLE=width: 244]

[TR]

[TD=align: center][/TD]

[TD=align: center]1.0 kg[/TD]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center]50 lb[/TD]

[TD=align: center]x[/TD]

[TD=align: center]----[/TD]

[TD=align: center]=[/TD]

[TD=align: center]22.7 kg[/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[TD=align: center]2.2 lb[/TD]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[TD=align: center]5 mg[/TD]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center]22.7 kg[/TD]

[TD=align: center]x[/TD]

[TD=align: center]----[/TD]

[TD=align: center]=[/TD]

[TD=align: center]113.6 mg[/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[TD=align: center]1.0 kg[/TD]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[TD=align: center]1 mL[/TD]

[TD=align: center][/TD]

[/TR]

[TR]

[TD=align: center]113.6 mg[/TD]

[TD=align: center]x[/TD]

[TD=align: center]----[/TD]

[TD=align: center]=[/TD]

[TD=align: center]0.9 mL[/TD]

[/TR]

[TR]

[TD=align: center][/TD]

[TD=align: center]125 mg[/TD]

[TD=align: center][/TD]

[/TR]

[/TABLE]