pharmacology problem, solve for me and tell mehow?:)))im trying to teach myself this

[sfranRNstudent]

Order: Unasyn 50 mg/kg IVPB every 4 hours

Supply: Unasyn 1.5 gram vial

Client weighs: 70 kg

Label Directions: Reconstitute each vial with 4mL sterile water for injection to yield 375 mg/mL

[Sterren, BSN, RN]

i don't want to solve it for you but i can give you some pointers to help you. first, figure out what you have and what you want. you're already given the reconstituted dosage of 375mg/ml, so that's what you have. you also need to figure out what you want. if you need mg/kg then multilply the mg dosage by the pt's weight in kg. that will give you the dosage you want. then it's a matter of setting up a math problem and cross multiplying.

want mg = have mg

---------[color=white]... --------

x ml[color=white].......... 1 ml

and cross multiply to find the mls you need to give for the correct dosage. hth.

[melisgood]

Well, first off, the 375mg/mL was calculated by taking 1500mg/4mL=375mg/mL.

I am assuming you are trying to figure out how much of the solution to draw up. They tell you the patient weighs 70kg so you just multiply that by 50mg to find the dose ordered for your patient's weight. The answer is 3500mg. You now can solve for x by doing.....3500mg/Xml=375mg/1mL. In otherwords, you divide 3500 by 375 and get 9.3mL, which is your answer! =)

[Daytonite, BSN, RN]

order: unasyn 50 mg/kg ivpb every 4 hours

supply: unasyn 1.5 gram vial

client weighs: 70 kg

label directions: reconstitute each vial with 4ml sterile water for injection to yield 375 mg/ml

by dimensional analysis:

50 mg/kg

(dose desired)

x 70 kg

(patient weight) x

1 ml/375 mg

(dose on hand)

=

9.3 ml

(amount to give)

[sfranRNstudent]

ok this is all new to me, i know they are gonna slam this on me when i start so i am tryin my best to learn all of this be4 hand....thanks

[sfranRNstudent]

i wish i could open the links you have but i dont have word ill have to go on another computer....thanks for all your responses they are always helpful

[Daytonite, BSN, RN]

there are links to online nursing drug calculation tutorials on post #6 of the nursing math thread sticky:

• https://allnurses.com/forums/f50/nursing-math-thread-264395.html