NEED HELP with MATH CALCULATIONS

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mattlorico in Los Angeles, California

54 months ago

ebony harrell in Saint Petersburg, Florida said: im stuck on a problem on my calculations homework

a physician asks the pharmacy to prepare 0.5L of a 1:5000 epinephrine solution. the availablesolution is 1:1000

how many ml of the solute are needed?
how many ml of solvent are needed?

someone please help me with this question!!!!!

=There is a lot of ways to do this, however the easiest one is:
1/5000 x 1000/1 x 500 ml = 100 ml

another way turn the ratio into percent and use the order divide by the supply multiply by the quantity

1/5000 x 100= 0.02%
1/1000 x 100% = 0.1%
using order divide by supply will give you
0.2/0.1 x 500 = 100 ml

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ebony harrell in Saint Petersburg, Florida

54 months ago

mattlorico in Los Angeles, California said: =There is a lot of ways to do this, however the easiest one is:
1/5000 x 1000/1 x 500 ml = 100 ml

another way turn the ratio into percent and use the order divide by the supply multiply by the quantity

1/5000 x 100= 0.02%
1/1000 x 100% = 0.1%
using order divide by supply will give you
0.2/0.1 x 500 = 100 ml

aw thank you so much

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dani in Blacksburg, Virginia

54 months ago

ohio in Mason, Ohio said: 10 Tabs
second question needs to have a final concentration to answer.
4.5%

90ml

Hi! Can someone show me how to get this answer? Thanks :-)

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Lester in Los Angeles, California

54 months ago

dani in Blacksburg, Virginia said: How many 200mg tablets would be required to make .5 liters of a 1:250 solution?

xmg/500ml=1000mg/250ml

x=2000mg

2000mg divide 200mg=10

10 tblets

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dani in Vinton, Virginia

54 months ago

Thank you. :-)

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donna in Jonesborough, Tennessee

54 months ago

I need help with this problem.

How much gentian violet is needed to prepare 100ml of a 1:10,000 solutin of gentian violet?

If anyone knows please show how to get the answer.

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donna in Jonesborough, Tennessee

54 months ago

How many ml of a 20% solution should be added to 50 ml of a 40% solution to obtain a 25% solution?

please show how to get answer if anyone knows.

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Gatorbob in Sebring, Florida

54 months ago

donna in Jonesborough, Tennessee said: How many ml of a 20% solution should be added to 50 ml of a 40% solution to obtain a 25% solution?

please show how to get answer if anyone knows.

Name
Concentration 40.0000 % OR mg / ml
Volume (opt) 50.00 ml

Name
Concentration 20.0000 % OR mg / ml
Volume (opt) 150.00 ml

Name
Concentration 25.0000 % OR mg / ml
Volume (opt) 200.00 ml

------------------------------------------------------

50.00 ml ( 20000.00 mg)
150.00 ml ( 30000.00 mg)
200.00 ml ( 50000.00 mg)
25.0000 gm / 100 ml
25.0000 %
or set up an alligation problem as follows:
40 | | 5 parts = 50 ml or 10 ml per part
| |
| 25 |
|Final Conc|
20 | |15 parts then equal 150 ml
Total Parts for 25% equal 200 ml total

Hope this helps

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Linda Thompson in Tyler, Texas

54 months ago

I really need help solving this problem and show me the formula on how you get the answer
a prescription is written for salicylic acid 1%, menthol 1/4% in triamcinolone0.1% cream. How much salicylic acid powder should be used if the prescription is for 240gm?
Thank You

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Jessica in Concord, California

53 months ago

During the middle of my final my tutot left, can you helkp me

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DORIS SANTAN in Los Angeles, California

52 months ago

I NEED HELP PLZ SOMEONE!!!

ORDER: 1000 cc NS IV for 24 h KVO ( to keep the vein open)
Drop Factor: 60 gtt/mL
Flow rate: _____ gtt/min

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Pufik in Santa Ana, California

52 months ago

Ok, 1cc = 1ml , 1000 cc = 1000 ml

1000 ml (1h) 60 gtt
-------- ---- ------ = 41,67 gtt/min
24 h 60 min 1ml

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DORIS SANTAN in Los Angeles, California

52 months ago

OK THNKS

HERES A ANOTHER

THE ORDER READS PENICILLIN G 200,000U I.M THE VIAL PENICILLLIN G 250,000 U PER mL. How much should I give?

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DORIS SANTANA in Los Angeles, California

52 months ago

HOW DO I WORK IN THIS PROBLEM WITH A FRACTION

ORDER: 1500 mL 2 1/2% D5W IV for 12 h
DROP FACTOR: 15 GTT/mL
FLOW RATE: __________gtt/min.

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Pufik in Santa Ana, California

52 months ago

200.000 250.000
-------- = ------- x = 0.8 ml
Xml ml

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Pufik in Santa Ana, California

52 months ago

1500ml/12h *(1h/60min)* (15gtt/ml) = 375 gtt/min

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Nohemi contreras in Santa Monica, California

52 months ago

order: penicillin 400,000 U IM q,3h
Supply: A 20 mL vial containing 1,000,000 U of Penicilling in dry form.
Directions: Adding 3.6 mL diluent yields 250,000 U/mL
Give: __________?

my answer is 0.4mL i dont know if its right ...

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Pufik in Santa Ana, California

52 months ago

yes i think you are right.

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sharon in Deerfield Beach, Florida

47 months ago

A physician ordered 600.000 U penicillin PO q6h. The available drug is 400.000 U per scored tablet. How many tablets you will administer.

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pam in Los Angeles, California

46 months ago

i need help finding out the weight of fluids on the iv bags, how do you do it?

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pam in Los Angeles, California

46 months ago

i need help finding the weight of fluids in the iv bags, what is the formula?

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CPhT in Plainfield, Illinois

45 months ago

Shannon in Windsor, Ontario said: Dilaudid HP 10mg/ml Cassette Available 10mg/ml
a) To make a 100ml cassette, how many mg's of Dilaudid HP is it?
b) Running at 2ml/hr how long will 1 cassette last?
c) 28ml TBA at 9am the next cassette is due when?

A.) 10mg = 1 ml
X = 100 ml ----10 X 100 / 1 = 1000mg

B.)2 ml = 1 hr
100ml = X ---------- 100 X 1 / 2 = 50 hours
[50 hours is 2 1/2 days]

C.)
100ml = 50 hours
28ml = X --------28 X 50 / 100 = 14 hours

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CPhT in Plainfield, Illinois

45 months ago

Shannon in Windsor, Ontario said: Dilaudid HP 10mg/ml Cassette Available 10mg/ml
a) To make a 100ml cassette, how many mg's of Dilaudid HP is it?
b) Running at 2ml/hr how long will 1 cassette last?
c) 28ml TBA at 9am the next cassette is due when?

A.) 10mg = 1 ml
X = 100 ml ----10 X 100 / 1 = 1000mg

B.)2 ml = 1 hr
100ml = X ---------- 100 X 1 / 2 = 50 hours
[50 hours is 2 1/2 days]

C.)
100ml = 50 hours
28ml = X --------28 X 50 / 100 = 14 hours

Pharmacy Rx owner

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Dnorth in Pocahontas, Iowa

44 months ago

I am looking to get how to get the answer, not the answer to the following:
0.027 gm = _____ mcg

Also I need to convert apothecary units:

30 gr = _______ounce and
1 fl dram = _____ fl oz.

convert household measurements:

10 ml = ______tsp

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lalala in West Covina, California

44 months ago

Dnorth in Pocahontas, Iowa said: I am looking to get how to get the answer, not the answer to the following:
0.027 gm = _____ mcg

Also I need to convert apothecary units:

30 gr = _______ounce and
1 fl dram = _____ fl oz.

convert household measurements:

10 ml = ______tsp

first problem
1 gram = 1,000,000 micrograms
so if you divide each side by 1 gram you get
1 = 10^6 micrograms/1 gram
it's equal to one because 1 gram and 10^6 micrograms are the same thing. it's just like saying 3/3 = 1 and t/t = 1
moreover, if you multiply anything by 1, that anything is still the same thing. so if you multiply 0.027 grams by 1, it's still 0.027. if you multiply 0.027 grams by 10^6 micrograms/1 gram, the mass is still gonna be worth 0.027, it's still the same amount, just the unit changes.
0.027 grams x 10^6 micrograms
---------------
1 gram
so you multiply 0.027 grams by 1 (which in this case is 10^6 micrograms/1 gram). the unit of grams cancel out so you get
0.027 x 10^6 micrograms
which simplifies to
27,000 micrograms or 2.7x10^4 micrograms

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lalala in West Covina, California

44 months ago

holy crap it messed up all of my spacing. ugh

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lalala in West Covina, California

44 months ago

Dnorth in Pocahontas, Iowa said: I am looking to get how to get the answer, not the answer to the following:
0.027 gm = _____ mcg

Also I need to convert apothecary units:

30 gr = _______ounce and
1 fl dram = _____ fl oz.

convert household measurements:

10 ml = ______tsp

alright here's an easier way, skipping all the background and work.
1 gram = 1,000,000 micrograms
you have 0.027 grams, so multiply both sides of the equation by 0.027
so now you have
0.027 grams = 27,000 micrograms
just do the same thing to the other problems. you should have the equalities in your text, or you can easily find them online

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Dnorth in Pocahontas, Iowa

44 months ago

Thank you for your help. I am just getting started as a pharmacy tech & hope to get certified in the next couple of months. Appreciate all the help and any suggestions.

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Lou in Overland Park, Kansas

44 months ago

Gatorbob in Sebring, Florida said: Name
Concentration 40.0000 % OR mg / ml
Volume (opt) 50.00 ml

Name
Concentration 20.0000 % OR mg / ml
Volume (opt) 150.00 ml

Name
Concentration 25.0000 % OR mg / ml
Volume (opt) 200.00 ml

------------------------------------------------------

50.00 ml ( 20000.00 mg)
150.00 ml ( 30000.00 mg)
200.00 ml ( 50000.00 mg)
25.0000 gm / 100 ml
25.0000 %
or set up an alligation problem as follows:
40 | | 5 parts = 50 ml or 10 ml per part
| |
| 25 |
|Final Conc|
20 | |15 parts then equal 150 ml
Total Parts for 25% equal 200 ml total

Hope this helps


How did you figure out the 150ml and the 200 ml. 50ml is the only volume given - how did you figure a final volume to divide the parts into and then multiply parts by the volume?
Could you explain this - I'm not getting it.
Thanks
Lou

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Keri

42 months ago

if 750 ml of a 2% solutionis diluted by 40% of its volume, what is the new concentration in mg/ml?

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MorganR in Los Angeles, California

38 months ago

I am searching for the equation to use to dilute a solution of 40 mg/ml to make a solution of 5mg/ml

I have a 30ml vial of Saline and a 5ml vial of Kenalog 40mg/ml

I need to end with a 30ml vial of Kenalog 5mg/ml

Does anyone have the equation I should use to calculate my answer?
I have hit the wall and this simple (I assume) solution just has me floored!!
Thank you!

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MorganR in Los Angeles, California

38 months ago

oops...sorry for the repeat...

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MorganR in Los Angeles, California

38 months ago

ok, fog lifted...figured it out.

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teresa in Reno, Nevada

38 months ago

i need help rx prolixin 4mg/5ml concentrate # sig: 6mg po tid x 90 days how many mlsof the drug is required per dose? how many mls of the drug is required per day? how many mls of the drug is required for the entire treament?

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cpht in Lockport, Illinois

38 months ago

teresa in Reno, Nevada said: i need help rx prolixin 4mg/5ml concentrate # sig: 6mg po tid x 90 days how many mlsof the drug is required per dose? how many mls of the drug is required per day? how many mls of the drug is required for the entire treament?

Prolixin is a antipsychotic drug. Dr. is prescribing the drug in liquid form so we will need to figure out how many ml's is 6mg from the sig provided.

4mg = 5ml
6mg = X ml ------ 6mg x 5ml / 4mg = 7.5ml

{So 7.5ml equals 6mg of the drug}

Per dose: 7.5ml
Per day: 7.5ml x 3x a day (tid) = 22.5ml

Entire treatment: 22.5ml x 90 days= 2025ml (that is alot of liqiuid medication)

Crystal Zamudio, CPhT
Pharmacy Rx Owner
www.wiziq.com/tutor-profile-crysta

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cpht in Lockport, Illinois

38 months ago

teresa in Reno, Nevada said: i need help rx prolixin 4mg/5ml concentrate # sig: 6mg po tid x 90 days how many mlsof the drug is required per dose? how many mls of the drug is required per day? how many mls of the drug is required for the entire treament?

Prolixin is a antipsychotic drug. Dr. is prescribing the drug in liquid form so we will need to figure out how many ml's is 6mg from the sig provided.

4mg = 5ml
6mg = X ml ------ 6mg x 5ml / 4mg = 7.5ml

{So 7.5ml equals 6mg of the drug}

Per dose: 7.5ml
Per day: 7.5ml x 3x a day (tid) = 22.5ml

Entire treatment: 22.5ml x 90 days= 2025ml (that is alot of liqiuid medication)

Crystal Zamudio, CPhT
Pharmacy Rx Owner
www.wiziq.com/tutor-profile-crysta

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Roe Stubs in Wylie, Texas

32 months ago

DORIS SANTAN in Los Angeles, California said: I NEED HELP PLZ SOMEONE!!!

ORDER: 1000 cc NS IV for 24 h KVO ( to keep the vein open)
Drop Factor: 60 gtt/mL
Flow rate: _____ gtt/min

gtt/mim= 1hr/60min -1000ml/10hrs-60gtt/ml=you first multiply all numbers at the top= 1x1000x60=60000, then multiply all at the bottom=60x10=600. Then divide the top number by the bottom number=60000/600=100 drops/min

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Peter in London, United Kingdom

31 months ago

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Traci in Fairmont, West Virginia

31 months ago

How many mLs of a syrup containing 85% of sucrose should be mixed with 150mL of a 60% sucrose syrup to make a syrup containing 80% sucrose?

Please help!

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im lost in London, United Kingdom

31 months ago

Referring to the empirical formulae represnted below,derive the ferrous iron content of the compounds yourself. Do your calculation match the iron content table ( this can find from Bnf, if you have bnf 61 theb page 577)
Please answer me. Thank you.

Ferrous fumarate c4H2FeO4

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vipan in Ahmadabad, India

31 months ago

if the dose of the drug given to the rat is 8mg in 0.1ml.i prepared 8mg/ml . but i cannot understand how 8mg/ml is converted to 8mg in 0.1 ml? pls sir reply me

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Crystal Allen in Tucson, Arizona

31 months ago

Based on the IV order, calculate:
a. Concentration that you would dilute the vial
b. Diluent volume
c. Volume to withdraw to prepare prescribed dose

Drug available: 1-g powder vial. Directions read: For IM use, dilute with 2.5 mL for a concentration of 330mg/mL. For IV use, dilute with 9.5 mL for a concentration of 100 mg/mL or dilute with 4.5 mL for a concentration of 200 mg/mL

500mg IVPB q12h
1.5 g IM BID

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Liza in Grand Rapids, Michigan

31 months ago

I need some help with knowing the steps to solving the following problem. How many capsules are needed to prepare 30ml of 1% clindamycin hydrochloride solution if each capsule containes 150mg of clindamycin hyrdochloride? Thank you very much!

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dani in Burnaby, British Columbia

30 months ago

C1V1=C2V2

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J in Stockton, California

29 months ago

still new at this so forgive me.
How do I get this answer: you rcv the foll prescription: Megace Susp 60mg bid; & the product avail is 40mg/mL in a 240mL container.
-How long will this bottle last the patient? The answer is 80 days but I can't get how the answer was achieved.
I tried the DODA method but keep getting wrong answers. Can someone help?

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J in Stockton, California

29 months ago

I'm still new at this so please bare w/ me. I have the answer but don't know how to get the answer. The question is: You receive the foll prescription: Megace Susp 60mg bid; and the product available is 40mg/mL in a 240mL container. How long will this bottle last the patient? I've tried the DODA method and still cant the answer which is supposedly 80days. Can someone help me please?

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Rph in Palm Beach Gardens, Florida

29 months ago

J in Stockton, California said: I'm still new at this so please bare w/ me. I have the answer but don't know how to get the answer. The question is: You receive the foll prescription: Megace Susp 60mg bid; and the product available is 40mg/mL in a 240mL container. How long will this bottle last the patient? I've tried the DODA method and still cant the answer which is supposedly 80days. Can someone help me please?

Answer: 60mg BID=120mg/day
40mg/ml * 240ml = 9600mg
9600mg/120mg/day = 80 days

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samuel Boucher in Chandler, Arizona

29 months ago

I am trying to figure this problem. I have to dilute 1g of powder to 330 mg/ml and give a 600 mg dose. I need to know how much diltent to add, how much to withdraw and what size syringe to use. I have never used or do I have a needle to know what size. I can problaby figure out the diluent to add

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rt in Port-of-spain, Trinidad and Tobago

29 months ago

how many grams of yellow mercuric oxide must be added to 30g of 1% yellow mercuric oxide ointment to prepare a 5% ointment.

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Brooke in Gallatin, Missouri

27 months ago

i need help solving this problem...i dont even know how to set it up..if someone could please explain how i get this answer that would be wonderful..thanks

how many 500mg metronidazole tablest will be needed to compound 150ml of 3% meronidazole suspension?

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