HELP HELP

  1. i've tried everything and can't get the right answer.

    1)Calculate the number of mL to administer with each dose. Round your answer to the nearest tenth.
    Ordered: Trimethobenzamide 125 mg IM q4h prn
    On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial
    I got 25


    2) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Ranitidine 45 mg IM now
    On hand:Ranitidine 25mg/mL 6mL Multi-Dose Vial
    I got 10.9

    3) Calculate the number of mL to administer. Round your answer to the nearest tenth.
    Ordered: Octreotide Acetate 220 mcg sub-q q12h
    On hand: Octreotide Acetate 500mcg/mL Single-Dose Vial

    4) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Trifluoperazine 5 mg IM now
    On hand: Trifluoperazine 2 mg/mL Single-Dose Vial

    5) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Heparin sodium 3000 units deep Sub-Q q8h
    On hand: Heparin sodium 10,000 units/mL Single-Dose vial

    6) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Medroxyprogesterone 750 mg IM weekly
    On hand: Medroxyprogesterone 400 mg/mL Single-Dose vial
  2. Visit justt139 profile page

    About justt139

    Joined: May '09; Posts: 11; Likes: 3

    13 Comments

  3. by   melsman1904
    i've tried everything and can't get the right answer.

    1)Calculate the number of mL to administer with each dose. Round your answer to the nearest tenth.
    Ordered: Trimethobenzamide 125 mg IM q4h prn
    On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial
    I got 25
    125 mg= 1.25 mL Rounded: 1.3ml

    2) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Ranitidine 45 mg IM now
    On hand:Ranitidine 25mg/mL 6mL Multi-Dose Vial
    I got 10.9
    45 mg = 1.8 mL

    3) Calculate the number of mL to administer. Round your answer to the nearest tenth.
    Ordered: Octreotide Acetate 220 mcg sub-q q12h
    On hand: Octreotide Acetate 500mcg/mL Single-Dose Vial
    220 mcg = 0.44 mL Rounded: 0.4 mL

    4) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Trifluoperazine 5 mg IM now
    On hand: Trifluoperazine 2 mg/mL Single-Dose Vial
    5 mg = 2.5 mL
    5) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Heparin sodium 3000 units deep Sub-Q q8h
    On hand: Heparin sodium 10,000 units/mL Single-Dose vial
    3000 units = 0.3 mL

    6) Calculate the number of mL to administer for the dose. Round your answer to the nearest tenth.
    Ordered: Medroxyprogesterone 750 mg IM weekly
    On hand: Medroxyprogesterone 400 mg/mL Single-Dose vial
    750 mg = 1.875 mL Rounded: 1.9 mL
  4. by   morte
    if we give you the answers, were does that leave you? show your work and see if someone can point out what you are doing wrong...
  5. by   justt139
    Thank you for everything ...you are an angel.!
  6. by   donnasRN
    Quote from morte
    if we give you the answers, were does that leave you? show your work and see if someone can point out what you are doing wrong...
    I agree. You should do all of the questions and show all of your work. You won't learn anything if you keep looking for answers on here. Why don't you create/join a study group with students in your class or ask your professor to help you during free time? Allnurses.com won't be there during your licensing exam! LOL
  7. by   JenRN30
    Justt,
    Do you understand what were doing wrong??
  8. by   melsman1904
    Although I did give the answers, I am in agreement with others. Show your work and someone will surely be able to point out what you're doing wrong. Just knowing the answers isn't good enough. You need to know how to find the answers.




    Ordered: Trimethobenzamide 125 mg IM q4h prn
    On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial

    125 mg : X mL :: 100 mg : 1 mL
    125 * 1
    100 * X
    100x = 125
    100/x = 125/ 100
    125 mg= 1.25 mL Rounded: 1.3ml


    Ordered: Ranitidine 45 mg IM now
    On hand:Ranitidine 25mg/mL 6mL Multi-Dose Vial

    45 mg: x mL:: 25 mg: 1 mL
    45 * 1
    25 * X
    25X = 45
    25/x = 45/25
    45 mg = 1.8 mL


    Ordered: Octreotide Acetate 220 mcg sub-q q12h
    On hand: Octreotide Acetate 500mcg/mL Single-Dose Vial

    220 mcg : X mL :: 500 mcg: 1 mL
    220 * 1
    500 * X
    500X = 220
    500/X = 220/ 500
    220 mcg = 0.44 mL Rounded: 0.4 mL


    Ordered: Trifluoperazine 5 mg IM now
    On hand: Trifluoperazine 2 mg/mL Single-Dose Vial

    5 mg : X ml :: 2 mg : 1 mL
    5 * 1
    2* X
    2X = 5
    2/ X = 5/ 2
    5 mg = 2.5 mL

    Ordered: Heparin sodium 3000 units deep Sub-Q q8h
    On hand: Heparin sodium 10,000 units/mL Single-Dose vial

    3000 units : X mL :: 10000 units : 1 mL
    3000 * 1
    10000 * X
    10000X = 3000
    10000/ X = 3000/ 10000
    3000 units = 0.3 mL


    Ordered: Medroxyprogesterone 750 mg IM weekly
    On hand: Medroxyprogesterone 400 mg/mL Single-Dose vial

    750 mg : X mL :: 400 mg : 1 mL
    750 * 1
    400 * X
    400X = 750
    400/ X = 750 / 400
    750 mg = 1.875 mL Rounded: 1.9 mL
    Last edit by melsman1904 on May 29, '09 : Reason: edited to show work
  9. by   roser13
    "Thank you for everything ...you are an angel.! "

    Seriously, I'm not trying to be a spoilsport, but I don't know how giving you the answers and not even showing you how they were obtained can be helpful.

    You will eventually have to do this for yourself. Every facility I've hired into has required a basic med calc test. It is to your advantage to figure out what you're doing wrong. If you're in nursing school, what will you do on the NCLEX without these skills?

    At the very least, can you look at your answers and figure out that they don't make sense? For instance, with (1), your answer of 25 mls of 100mg/ml drug would yield a dose of 2500 mgs. Of course, that's not right.

    Sometimes when I would get confused (because I'm arithmetically challenged), it helped me to try to use logic.
  10. by   cherrybreeze
    I agree, we would need to know HOW you're getting those answers, if it's actually going to be of help and not just answering them FOR you.

    I can see from the first question that, it looks like you took the "20ml multi dose vial" into consideration, and that part of the question is irrelevant.
  11. by   GOMER42
    :icon_roll
    Quote from justt139
    Thank you for everything ...you are an angel.!
    :icon_roll
  12. by   mntgrl
    I think you are using the amount of the ml in the whole vial instead of the medication concentration which is mg/ml
    for example
    1)Calculate the number of mL to administer with each dose. Round your answer to the nearest tenth.
    Ordered: Trimethobenzamide 125 mg IM q4h prn
    On hand: Trimethobenzamide 100mg/mL 20mL Multi-Dose Vial
    I got 25
    if you use Desired/Have x ML (ml of the doseage concentration not the whole vial) you get the answer
    125mg/100mg x 1ml = 1.25ml rounded to nearest tenth=1.3ml
    hope it helps
  13. by   Daytonite
    i have previously suggested that you will get better responses if you post these kinds of questions on the nursing student assistance forum (click the students tab above to get to this forum). one of the moderators has already moved one of your threads to that forum. you will find tutorials on how to work medication math problems on post #2 of this sticky thread: https://allnurses.com/general-nursin...ad-264395.html - the nursing math thread
  14. by   rnffemtguy
    I'll admit I struggled with math in nursing school, and it didn't matter who tried to explain it to me it just made it worse, but with alot of hard work I got proficient at it. Of course I didn't know about allnurses.com at the time......

    I'll save you alot of clicking and give you the links to the 2 websites that were the biggest help to me (they are in the link Daytonite posted):

    http://www.manuelsweb.com/nrs_calculators.htm

    http://www.accd.edu/sac/nursing/math/default.html

    Here's a tip, don't be lazy and just plug the problems into the calculators, use the formulas provided, work it out & use the calculators to check your answers

    To paraphrase a very dear instructor I had: "MEMORIZE THE FORMULAS DUMMY" :spin:

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