med dosage calculation

dcwang · Apr 28, 2015

No it wasn't a multiple choice question. It was a textbook question, which asked us to write out the name based on the label.

Mavrick, BSN, RN · Apr 28, 2015

Both Xanax and Xanax XR are Schedule IV Controlled substances.

A label for Xanax XR is clearly labeled with the XR.

Tenebrae, BSN, RN · Apr 29, 2015

the prescriber ordered propantheline bromide 30mg PO ac and hs. How many grams of propantheline bromide will the pt receive in one week?
here's what I did
30mg X 2= 60mg per day

AC=meals HS=bed time. Most people have three meals a day and one bed time. So how many doses will your patient receive in a day?

60mg X 7= 42 mg

Again, correct sum however your original dose amount is incorrect

So, try the calculation again knowing that AC=meal times, HS bed time

When I studied we were always taught to show the working for our drug calculations, so if we got one point wrong we should be able to show that we understand the theory behind the calculation

Mavrick, BSN, RN · Apr 29, 2015

Again, correct sum however your original dose amount is incorrect
When I studied we were always taught to show the working for our drug calculations, so if we got one point wrong we should be able to show that we understand the theory behind the calculation

Check your math Tenebrae. Can I tease you about puttin' on your glasses?

Where I studied we were taught to include the units in calculations so you could check your work. For example 60mg/day x 7day/week = 420 mg/week. (the unit "day" cancels out)

Tenebrae, BSN, RN · Apr 30, 2015

Wouldnt be the first time I've read something wrong..... :roflmao: I think you may be confused on my language

Check your math Tenebrae. Can I tease you about puttin' on your glasses?
Where I studied we were taught to include the units in calculations so you could check your work. For example 60mg/day x 7day/week = 420 mg/week. (the unit "day" cancels out)

the prescriber ordered propantheline bromide 30mg PO ac and hs. How many grams of propantheline bromide will the pt receive in one week?
here's what I did
30mg X 2= 60mg per day
60mg X 7= 42 mg
42mg= 0.042g/week
The answer in the book says 0.84g... I must be doing something wrong.

For a patient to recieve 30mg of propantheline bromide AC and Hs would result in

One days dose equals 30mg X 4 (Breakfast, Lunch, Tea and Bedtime dose) =120mg

One weeks total dose in grams 120mg X 7 = 840mg

Answer converted into grams = 0.84g

dcwang · Apr 30, 2015

Thank you everyone... I realize this is very important, can't give pt wrong dosage of medication. It could be very life threatening in a clinical setting. Must must study/drill study/drill... For some reason this reminds me of stoichiometry in chemistry.

Mavrick, BSN, RN · Apr 30, 2015

I thought you were responding to charming_kitty's original math error of 60mg X 7= 42 mg as a correct sum. My intent was to tease you about needing glasses to see that 60 x 7 is not 42. The 60 is not correct because of kitty's misunderstanding of ac but the 42 is incorrect because of a math error.

In my math classes we would carry the units with the numbers to check ourselves that the correct answer would also have the correct units.

Is "tea" considered a meal? Is it the same as "dinner" (what we call the evening meal in the States.) Is the insulin you give with tea intended to cover the calories eaten at dinner? This is a curiosity to me.

aeris99 · May 12, 2015

@mavrick, the answer in the book was Xanax XR, it was asking for the name of a drug that is a controlled substance. I put Xanax based on the drug label, but noticed that the answer was specifically Xanax XR

I would have answered alprazolam. Our tests always ask generic names. But that label is not for XR so yea...typo in the book maybe?