Help a nursing student with a drug calculation PLEASE!!!

[nursing_student24]

I guess i wasn't paying attention during this part of class but i have a test tommorow, and heres a practice question i was given.

"Elixir of Tylenol grv by mouth 3 times a day is ordered and it is available 160mg per 5ml."

I would normally know how to do the problem but i dont know what "grv" means.

EDIT:

YEAH!!!! WHOOOO HOOOOO!! Thanks! Now i have the answer its 9.375mL!!!!! THANKS RN4NICU!!!!

I'm kinda nervous because i have to make a 90% on the drug calculation test tommorow! ugh..i have 3 chances to pass then thats it. *_*

[RN4NICU, LPN, LVN]

grv (gr. V) is 5 grains

That should help :)

[morte, LPN, LVN]

good heavens, they are still teaching apothecary measures????? and since they are, that should have been gr v.......

[chenoaspirit, ASN, RN]

We have a doc who still writes scripts with grains. I hate doing the math.

[chenoaspirit, ASN, RN]

here is a page that may help you

http://74.6.239.67/search/cache?ei=UTF-8&p=drug+calculation+grain&u=gaems.net/download/drugcalc.pdf&w=drug+calculation+calculations+grain+grains&d=TXRoPxg5RUZO&icp=1&.intl=us

[chenoaspirit, ASN, RN]

wow, we had to get 100% to pass. Good luck!

[Daytonite, BSN, RN]

elixir of tylenol grains v (5) by mouth 3 times a day is ordered and it is available 160mg per 5ml

dose desired

: 5 grains 3 times a day

dose on hand

: 160 mg/5 ml

conversion factor

: 60 mg = 1 grain

5 ml/160 mg

(dose on hand)

x 5 grains

(dose desired)

x 60 mg/1 grain

(conversion factor) =

9.375 ml/day

which i would round to

9.4 mls

and draw up in a 10cc syringe for accuracy.

there are links to drug calculation tutorials and conversion charts that you can print out listed on post #3 of this sticky thread on the general nursing student discussion forum

• https://allnurses.com/forums/f50/nursing-math-thread-264395.html - the nursing math thread
  • https://allnurses.com/forums/2520769-post3.html - post #3

[brissygal, BSN, RN]

Thanks for the tip,

I am an Australian nurse and when I last nursed in the USA (almost 7 years ago) - I got slammed with a grain of morphine? In Australia we are metric and I did not have a clue what this order even meant. I finally worked it out, took an hour to figure the equation out.

[locolorenzo22, BSN, RN]

Nobody writes grains...but they still use it....so go figure.

[subee, MSN, CRNA]

I guess i wasn't paying attention during this part of class but i have a test tommorow, and heres a practice question i was given.

"Elixir of Tylenol grv by mouth 3 times a day is ordered and it is available 160mg per 5ml."

I would normally know how to do the problem but i dont know what "grv" means.

EDIT:

YEAH!!!! WHOOOO HOOOOO!! Thanks! Now i have the answer its 9.375mL!!!!! THANKS RN4NICU!!!!

I'm kinda nervous because i have to make a 90% on the drug calculation test tommorow! ugh..i have 3 chances to pass then thats it. *_*

"grv" is an unacceptable abbreviation by dingbat's standards. Its simply an unacceptable order.