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## Open Math Questions.

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Solution mL problem  A physician has ordered a pharmacy technician to prepare 20 mg dosage of Percocet® for a patient. Percocet® is available in a 0.5% solution. How many mL ...

Dosage calculation  You receive an order for :
APAP with codeine elixir 4oz.
120mg/12mg/5 mL
Sig: 1 tbsp PO q6h p.r.n.
Each prescribed dose will contain:
A. 120mg APAP ...

Drug Compounding Calculation  A prescription is written for: acyclovir 1200mg, silica gel. micronized 0.12gm, polyethylene glycol 3350 6.5gm, polyethylene glycol 400 15ml. How many ...

pharmacy dosage calculation  A physician orders .5L of an 8% drug solution.
You only have 1L of 10% solution available. The solution can be diluted with SWFI.
Which of the following ...

pharmacy math brain teaser  Challenge : The pharmacy has an old style balance scale like the one above. You have only two measuring counter weights: • 30 grams •...

Powder Volume Math  A vial containing 500 mg of powder states that the addition of 1.8 ml of sterile water for injection will yield a solution containing 250 mg/ml. What is ...

MG.KG/HR  I'm having trouble solving this problem. Looks easy, but maybe I'm trying to put too much info to solve. Okay here it goes:

The dose of a drug for a ...

Compounding Problem  How many 500-mg metronidazole tablets will be needed to compound 150 ml of 3% metronidazole suspension?

IV calculation word problem  heparin 25000 U in 250 ml D5W is running through an administration set delivering 60 drops/ml. the flow rate require to deliver a heparin dose of 15 U/...

Normal Saline Mixture  How many Liters of 1/2NS solution can be made from 90 grams of NaCl?
A. 4.5
B. 20
C. 37.5
D. None of the above

concentrations and dilutions  A drug is supplied as a 40 mg/mL solution in a 50 mL vial. You need to make 10 mL of a 10 mg/mL solution. How much concentrate will be needed? mL
How ...

What type of math?  My Cd tells me to solve this problem here using (IS)(IV)=(FS)(FV) I, don't really understand that method, Is there any other way I can do this problem ...

Alligation with 3 strengths  This question involves 3 different strengths of product to result in a final needed %strength.

I know how to solve the problem using 2 products but ...

proportion math ?  question is:
How many tabs would be required to make a 1.5 liter of a 1:250 solution the problem is written as :

1gm
____  =  _______
...

Alligation Question Example  An order requires 800mL of 1.5% drug 'AA' solution. The Pharmacy stocks 15mL ampules of 80% drug 'AA' solution, which you'll dilute with D5NS. How many ...

Tricky solution question  A hospital pharmacist dilutes a vial containing 1gm of antibiotic with 10ml of water. The solution is then added to 100ml of D5W. What is the concentration,...

Pharmacy Mixture Math  I have a tin of formula that is 730g. I need to use two scoops at 3.5 teaspoons per scoop for every 100ml of water. How many scoops are in the tin and ...

question about math  1.A solution of Halperidol (haldol) contains 2mg/ml of active ingredient. how many grams would be in 473ml of this solution?

a. 9.46gm
b. 0.946gm
c....

Free PTCB practice quiz 5 # 4  Would you please show me how to arrive at this answer? I thought I was getting a handle on alligations, but this one throws me because I do not see enough ...

4 Dosage Calculations  1. The Doctor orders: Dilantin 100mg QD. Dilantin comes 125mg / 5ml. How many mL will you give per dose?

2.The Doctor orders Vicodin one by mouth every ...

Drug suspension conversion  Cefaclor is a cephalosporin antibiotic used to treat bacterial infections. A physician has ordered: Cefaclor 450mg tid. The drug is available as a 7.5%...

Concentration question ?  A Pen G package label reads 2.5 million units of dry powder. If 8ml of water is added to it, the concentration is 250,000 units/ml. How much water is ...

Concentration from Ontario exam  Aerosol OT (AOT) is used in veterinary medicine as a laxative. If 250 g of AOT is dissolved in 1 000 mL of glycerin (density of glycerin is 1.25 g/mL), the ...

Business Percentage Math  How do I calculate the tax rate if the cost of the product is \$69.99 and the total cost of the product after tax is \$75.94? Reply (by Keith ) This ...

solution / diluent  A pharmacy carries 50% solution. A doctor writes an order for 50mL of a 250mg/mL solution.
How many mililiters of stock are needed?
How many mililiters ...

Dextrose and Sterile Water mix  You need to compound a 500mL IV of 10% dextrose. You only have 1 Gallon of 20% dextrose in stock, how much SWFI will you need to use?
A. 100mL
B. 200mL
...

Prednisone Tapering  Rx: Prednisone 40mg daily for 3 days. Reduce the dose by 5mg every 3 days until complete. Prednisone is available in 5mg tablets. How many tablets are ...

Parenteral Nutrition  How many milliliters of 10% crystalline amino acid solution and 70% dextrose solution ( do not calculate water) are needed to make 2000mls of a parenteral ...

Alligations with decimal   Ordered is 0.9% normal saline
In Stock is a 10% sodium chloride
How many milliliters of water must you add to 500mL of a 10% stock solution of sodium ...

Your are to dose a 65kg patient at 13 mg/kg  You are to dose a 65kg patient at 13 mg/kg.

What is the dose in mg needed?

PERCENTAGE PROBLEM (C1V1=C2V2)  How many milliliters of 2.7% NaCl solution need to be added to distilled water to make 1L of normal saline.

Mixture math dilemma  I have 2 questions that I am stuck on, as I just started my PRODUCT PREP course.

PREPARE 1.5L OF ALUMINUM CHLORIDE 25% V/V CONCENTRATE

HOW MANY ...

conversion math practice problem  a doctor has ordered that a patient be given 15g of glucose, which is available in a concentration of 50.00 g glucose/ 1000.0 mL of solution. what volume ...

question about peptide dilution  peptide, M.W. is 1007.18 /1mg . How many ml will this make in a working solution of 20 USP Units and less than 0.4 units of presser activity per mL of ...

Nursing Med Calculaton  The pharmacist has prepared Ampicillin 500 mg in a 50 ml D5W bag to infuse at a rate of 100 ml / hour. How long would it take for the Ampicillin to infuse...

Dosage Problem  Dr. Caldwell prescribes the antibiotic ampicillin for the treatment of a child's ear infection. If the daily dose of ampicillin is 110 mg/kg of body weight,...

Alligation Tic-Tac-Toe math  A prescription calls for an 80% concentration of cream A. Your pharmacy stocks cream A in the 95% and 10% commercially available strengths. Calculate the ...

Alligation question from Canada  How many grams of sulfathiazole should be added to
3400 g of a 10% sulfathiazole cream to prepare a cream containing 15% sulfathiazole? The answer ...

Percentage Math Problem  How many grams of glucose would you need to make 500ml of an 8% glucose solution. Can you tell me the steps involve along with the answer? Reply ...

D5NS Mixture math example   You have an order to dispense 1000mL of D5NS. When you look at our stock, we do not have any bags of D5NS on the shelf. The pharmacist asks if you will ...

Solution Dilution  If 200 mL of an 11% solution is diluted to 1500 mL what is the strength of the solution?
Here's the set-up: (equation)
(200mL)...

iv problem  an iv that contains 2mg in 150ml is being infused at a rate of 25ml/hour.how many micrograms will be administered per hour?

Flow rate calculation practice  A Micro-drip IV has been set to drop 10gtt/min. The bag contains 450mg of the a particular drug in a total of 1000ml. How many mg of the drug will the ...

Alligation issue  If 60 grams of 1% Ointment "L" is mixed with 80 grams of 2.5% Ointment "L", what is the % of Ointment "L" in final mixture?
A. 2.14%
B. 1.86%
C. 1.73%...

IV Flow Rate problem  A 110lb woman is started on a nitroglycerin IV drip. The order is to administer the nitroglycerin at 5mcg/min. The pharmacy sends a 250ml IV container ...

PTCB Quiz Math  The Pharmacist hands you a 1.5L bottle of a 20% solution and asks that you mix it with sterile water to make as much 12% solution as possible. How much ...

Heparin volume  You need to prepare a Heparin IV bag of 25,000 units in D5W 500mL. Your pharmacy usually uses 2.5mL of 10,000iu/mL to make these bags, but the only available ...

Pharmacy Math Questions  1)How many grams of 20% zinc oxide ointment will deliver 8 g of zinc oxide?

2)How many 150 clyndamycin capsules are required to compound a prescription ...

C1V1=C2V2  you have a 250ml bottle of 50% dextrose. you need to prepare 150 ml of an 8% dextrose solution. how much of the concentrated solution will you use? how ...

Question about "dilutions"  Rx: Prostaglandin E 10mcg/ml
If the stock container of Prostaglandin E is 100mg/ml, how many 9-ml dilutions are required to prepare the ordered concentration?...

Dispensing problem?   I will be taking my exam this coming weekend. I am doing as many practice questions as possible. However, I have been having a hard time with some of the ...

Not an Alligation ?  How many mL of water should be added to 2500mL of 83% (v/v)alcohol to prepare 50% (v/v) alcohol?
Reply (by Keith) Although you technically could use ...

I need HELP with MATH.   For the life of me, I can't get the equation (IS)(IV)=(FS)(FV). it's difficult for me for some reason to tell apart the difference between an alligation ...

how to make 1/250 a percent  how do you make 1/250 a percent. Reply (by Keith) Anytime you see a fraction, it's really just a Division problem. In this case it's 1 ÷ 250 If ...

CHILD DOSAGE QUESTION  PRESCRIPTION FOR ICAR 15 MB/1.25 ML GIVEN TO A CHILD 2 1/2 YEARS OLD WEIGHING 27 LBS. DIRECTIONS READ GIVE 1 1/4 TEASPOON BY MOUTH ONCE DAILY FOR 4-6 WEEKS ...

Having trouble setting up this math problem.  What is the percent strength (V/V) of alcohol in a mixture of 2000 ml of 35% (V/V) alcohol, 750ml of 55% (V/V) alcohol, and 750ml of 65% (V/V) alcohol?...

Finding the percentage strengh  If 15 grams of 1% ointment are combined with 30 grams of 2.5% ointment, what is the percentage strength of the final product ?

Question about ALLIGATIONS  How will I know that alligation is what they are asking for or it is another equation? Reply (Keith) When you are asked to prepare some kind of mixture ...

Bonus quiz #4 Question 13.  I cannot get the correct answer for this question, and nothing like this is in my study book, or on the websites I frequent. Can anyone help?

Question:...

percentage math question  Patient is at your store buying a glucose monitor. The item sells for \$69.99. After tax their total is \$75.94. What is the tax rate ?

IV Drip Rate  Can you explain how to do the following problem from Bonus Quiz 8?

An IV Drip containing 400 mg of a drug in a 500 mL solution is ordered to run at ...

Question about Retail Math  A patient is at your store buying a glucose monitor. the item sells for \$69.99. After tax their total is \$75.94. what is the tax rate?

Diluting solution question  How much 95% ethyl alcohol is needed to make 5ml of 50% alcohol solution? How much water is needed? Reply: (Keith)
Stan, you could solve this either ...

quiz 4 question 9
How do you find 8 bottles on question 9 of quiz 4. Reply: (Keith)
The best way is to learn and use the formula:
C1V1=C2V2 Here is a link that ...

question about hourly rate of infusion  A bag of saline with an infusion apparatus is labeled 15 gtt/ml. The flow rate is 60 gtt/min. What is the hourly rate of infusion? Help! Is this ...

alligation algebra  You are asked to make 150 ml of a 3% Na Borate solution. Using 5% Na Borate stock solution and water, how much of each do you need? Reply Reply (by Keith)...

infusion rates  The infusion rate for 50ml of D5W containing 3.5 G of an antibiotic is 200ml/hr. what is the infusion rate in drops/min if the IV set is calibrated at ...

question about iv calculations  On the bonus quiz #2 question #10. Can you explain how to do that.

An IV Drip is ordered to run at 4 gtt/min. It contains 875 mg of a drug in a 250 ...

Half Life Question?  How do you figure out this question from the practice exam? If a Tadalafil 10mg/tab has a typical half life of 17.5 hours, how long will it take until ...

Prescription / Dosage Problem  I need some help with this problem:

METRONIDAZOLE is prescribed 400mg tds. stock issue is 200mg how many tablets will be given to the patient in 48 ...

HOW MANY MILLILITERS OF 50% DEXTROSE SOLUTION AND HOW MANY MILLILITERS OF 5% DEXTROSE SOLUTION ...

More math problems   Thank you for your help yesterday,
Found your website this past month and it has given me extra help for the pharmacy tech exam tomorrow.

I have ...

question about pharmacy math (mixture)  What ratio of 25% dextrose and 10% dextrose should be mixed to make a 20% solution?

Reply (by Keith):That would be 2 parts 25% -to- 1 part 5%.

The ...

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