## Open Math Questions

Celcius to Fahrenheit conversion shortcut  So I just watched the video about "the easiest way to do this" and I think I came up with a much easier way of doing it.

Just take the :
F=(9/5)C +32 ...

percentage problem  There are 200 Prescriptions in the queue. 25% of the orders are for Cholesterol medication. Another 1\5 of the orders are for antidepressants. The rest ...

SUSPENSION  A prescription for a suspension calls for a dose of 250mg to be given twice a day. If the suspension contains 300mg/5ml, how many ml are needed for one ...

Prescription Math Calculation  Rx: Drug K 300mg TID X30D.
In stock: 150mg Drug K Tabs.
How many tablets to fill this order?
A. 30
B. 60
C. 90
D. 180

wholesale price vs retail  The wholesale cost of #30 drug 'E' is \$47.66. Your pharmacy charges a 12% mark-up and a flat \$6.50 dispensing fee. How much will the patient be charged ...

Ointment Strength Calculation  I'm preparing for a PEBC EVALUATION exam and I'm stumped on this question. Several pharmacists and technicians have come up with the answer of 4.8g, however,...

Not really 30grams in 1 ounce?  This web site says there are 30 grams in one ounce. But, everywhere I have looked says 28 grams. Which is the correct information? I am not sure which ...

Child's dose math/ tablets (2)  I don't even understand where to begin! lol

1)A child's dose for cefadroxil is 30 mg/kg body weight once a day for 14 days. What is the smallest bottle ...

Percentage problem (business Math)  What is the full price of 90 tablets of "Drug Y", assuming your cost for 500 tablets is \$425.00 with a 28% markup and a dispensing fee of \$4.85?

pharmacy math / finding volume?  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% suspension....

alligation practice question  Doctors order: 50 ml of a 12% boric solution. The pharmacy carries only 80% boric solution. How much concentrate will you need? How much dileunt?

solution to #20 on bonus PTCB practice quiz 5  Hello. As usual, I was over analyzing question 20 on the Bonus free practice quiz 5 (Opens in new window) After putting it down and coming back to ...

calculating body surface area  How do you calculate body surface area?

powder volume  A vial contains 2g of an oral antibiotic in powder form. The medication must be reconstituted to 200mg/tsp for a patient. How much diluent must be added?...

mixing solutions problem  How much 75% ethanol is needed to make 300ml of 30% ethanol?
A. 80mL
B. 120mL
C. 180mL
D. 240mL

Would really appreciate it if someone could help ...

solution strength  How many milligrams of active ingredient will you need to prepare 120 mL of a product that contains 4 mg/mL of active ingredients?

Solution Percentage Strength  If you mix 100 ml of 70% alcohol with 100 ml of 90% alcohol, what is the percentage of alcohol in the final mixture?

Regarding IV flow rates  A Microdrip IV has been set to drop 10 gtt/min. The bag contains 450mg of a particular drug in a total of 1000ml. How many mg of the drug will the patient ...

Proportions & ratios math  Formula M and formula D are to be combined in a 2:1 ratio to make solution MD. How many of each is required to make 90mL of this mixture?
A. 75ml/15ml
...

Powder Volume problem  The doctor orders Amoxicillin 165 mg/5ml. You only have Amoxicillin 250 mg/5 ml. When reconstituted with 60 ml of purified water, the total volume will ...

infusion problem #12 quiz 10  I just can't seem to solve an infusion problem when I don't know the amount to put over the hours. See problem below:

The physician orders an IV infusion ...

question about ml/hr  Here is my problem:

The initial dose of Rebif is 0.7mg/kg/hr for 12 hours. How many ml of Rebif IV solution containing 400mg/ml would be needed for ...

question about concentrations and dilutions  A patient at your retail pharmacy has been advised by her Gynecologist to prepare a 2% vinegar solution to be used as a vaginal douche. She is asking for ...

Alligation math with water problem  I am studying for the PTCB exam and came across this question. How much water should be added to 95% ethanol to make 1L of a 30% solution?
I thought ...

frustrated with proportions math  I feel like the answer is right in my face. I know this is a proportion question. But why is my answer coming out either, 20, or 2000?

How many units ...

Pharmacy Compounding Problem  Your receive a prescription for Metronidazole 250mg/5mL po qid 240mL. You find that you will have to compound this using 500mg tablets. How many tablets ...

complex infusion rate question  You receive an order for 250 mg of Aminophylline in normal saline (total volume 500 ml). The patient weighs 110 lb. The Aminophylline is to be administered ...

I am having trouble solving this alligation problem.  Rx: Normal saline. How many milliliters of water must you add to 500ml of a 10% stock solution of sodium chloride to make a batch of normal saline (sodium ...

Childrens Dosages   How much medication should a 70lb child receive if the adult dose is 250mg? Reply: (by Keith) It depends: what you need to know is either 1)which method ...

Pharmacy Math Dilution Question  To get 33mg/ml from a vial of 2.1g.How many mL will you need to dilute the vial with?

Question about infusion rate and time  I'm stuck on this question and cannot figure it out for the life of me:

An IV has been ordered to run at 2.5 gtts/min. The IV contains ...

Dilution  What amount of 6% Nitroglycerin ointment must be diluted with Lanolin Petrolatum base to fill an order for 1 pound of 2% Nitroglycerin?

Question about alligation  How many grams of petrolatum should you add to 30 g of hydrocortisone 2.5% ointment to reduce its strength to 2.0%? The percent strength of petrolatum ...

QUESTIONS ABOUT MATH FORMULAS I'M GETTING READY TO TAKE THE PTCB NEXT MONTH. MY QUESTION IS: HOW DO I KNOW WHAT FORMULA TO USE WHEN SOLVING WORD PROBLEMS? I CAN DO THE MATH, BUT I'...

INFUSION RATE  The infusion rate of an IV is over twelve hours. The total volume is 800 ml. What is the infusion rate in ml's per minute?

Question about MATH on Bonus exams  Need help solving #7 and #14 on Bonus Quiz #2

#7, says:
How many Ml of water should be mixed with 1200 ml of at 65% solution ...

Question about dilution  After adding 20ml of Sterile Water for Injection to a 4gm vial of powdered drug, the concentration is 325mg/2ml. What is the powder volume of the drug?...

diluent in concentration  A 10g vial label states that the concentration is 100mg/ml if you add 87ml.How much you need to add to get a concentration of 50mg/ml.

Bonus free practice exam #2 question #10 setup  Can you show how to get the answer to this one?

Reply (Keith): Sure, Here it is:
An IV Drip is ordered to run at 4 gtt/min. It contains 875 mg of ...

Question about Concentrations and Dilutions  My pharmacy technician class just recently started into the module of concentrations and dilutions. From the alligations and more of the easy stuff this ...

Pharmacy Math - Dilution Question  How many mL of a 30% solution should be added to 60 mL of a 50% solution to obtain a 35% solution?

algebra  How do u solve 100 ml + 250 ml = X ml + 300 ml?

Dilution problem  Hello,I'm having such a hard time setting up proportion math,
i just can't figure it out which number suppose to go on top and bottom,so please help me ...

solution, dilution and concentration  A 1000-cc solution contains 60 g of drug. What is the percentage of drug in this solution?

Question about ALLIGATION How many 100 mg tablets will be needed to make 500 cc of 1:250 solution?

QUESTION ABOUT SEIZURE MEDICINE  A SEIZURE MEDICINE IS TO BE GIVEN AT THE RATE OF 100MG/8HR.YOUR BAG HAS A CONCENTRATION OF 750MG/1000ML.CALCULATE THE APPROPRIATE GTT/MIN. (SET cal. = 15GTT/...

bonus quiz # 5 Q. # 9 how to set up???  what is the fastest most efficient way to solve this

Valproic acid syrup is available as 250 mg/5 cc. If a patient is taking 750 mg in the morning and ...

Question about dilution  How many ml of a stock 4% solution should be used to make 3 pints of solution with 100 mg per liter?

How do you solve (bonus practice quiz 7) #17  how do you solve this one?
You receive an order for 250 mg of Aminophylline in normal saline (total volume 500 ml). The patient weighs 110 lb. The Aminophylline ...

question about alligations  An order calls for 16fl oz, of a 20% solution. The stock solutions available are 80% and 8%. How many milliliters of each of the stock solutions are ...

Third- party plan cover problem  Can you solve this problem, please? I am not the author of this, it just that I am studying for the PTCB.

Calculate the amount per fill allowable ...

Proportions With Percent  A drug is available in a 20% solution. A patient weights 44.5 kg and is to take 40mg/kg q6h X 10 days.

1.___mg = 1 dose

2.___mL = 1 dose

3.___mL ...

pharmacy tech question  What is the percentage strength of a solution that is made by adding 200ml of water to 60ml of a 25% solution?

Insulin Calculations  I want to know how to calculate how many bottles of INSULIN it would take to fill a 1 month supply if the patient is injecting 35 units in the morning ...

Concentration  Aerosol OT is used in veterinary medicine as a laxative. If 250g of AOT is dissolved in 1000ml of glycerin (density of glycerin is 1.25g/ml) the concentration ...

Alligation calculation missing information  how many milliters of a 50% stock solution is needed to prepare 150 ml of a 30% solution? dont understand. Reply (by Keith) I think what is confusing ...

Proportion Math....   How many milligrams of a drug would be in one pint if each dram has 1/8th of a grain? Reply (By Keith) This is a great question. I say that because ...

Alligation question  Can you please show me how to figure out the answer.
How many grams of coal tar should be added to 925gm of zinc oxide paste to prepare a 6% coal tar ...

ratio conversion  How many 400mg etodolac tablets will be needed to make 12 ounces of 18% solution?

Alligations  What is the final percentage of a solution that is made from mixing 300ml of 70% alcohol with 200ml of 95% alcohol?

reply: (Keith) This is actually ...

Question about TPN:   Question about (Total Parenteral Nutrition)TPN: A TPN order calls for these amounts to be made from the items on hand. The total volume is to be 1000ml....

Question about Percentage Strength and Percentage Concentration  I was given 400mg/5ml and asked to find the Percentage Concentration?

Should the answer be 0.8% or 0.08%. Whats the difference between % strength and ...

"question about LIQUID DOSAGE FORMS"  your order is for ampicillin 0.5g. you have a solution in stock that is 250mg/5ml. what amount is dispensed?

Ratio / Conversion pharmacy math  How many 100 mg tablets will you need to make 1/2liter of a 1:250 solution? I get 60 but the answer I get is not one of the choices.What am I doing ...

Alligation Question  How much 1% boric acid solution and 5% boric acid solution are needed to make 30ml 3% boric acid solution? Reply (Keith) : This problem would be solved ...

Question on Quiz#4 problem 9  You have been asked to dilute and repackage 1 Liter of a 20% solution into 1 pint bottles of 5% solution. How many bottles will you be able to fill?

Can ...

Question about math  What is the resulting percentage strength of an ointment if you mix 10 grains of hydrocortisone into aquaphor to make 400 grains?

Alligation math  I understand how you arrived at the answers for your example and the first listed question example. However, when you did the second listed question example,...

Tricky pharmacy math Problem  Can you show me the math for this question: Which of the following formulas will produce a 1000ml solution of 3.5% amino acid in 15% dextrose?

A)...

exam math questions  Hey guys, I finished the pharm tech program at the end of may and have been studying since then for the certification exam (which i take tomorrow). I ...

PHARMACY CALCULATION ?  how do you calculate a solution of 1:1:1 maalox, lidocaine and diphenhydramine to make 240ml Reply (Keith): When you see 1:1:1 that means 1 part : 1 ...

flow rates  A physician orders a drug to be infused at: 10mcg/kg/min . The patient weighs 70kg . The total dose the patient is to receive is 21mg . How long must ...

question about math ( IV calculation )  What is the flow rate to be used to infuse 1200 ml of dextrose 5% in water over 4 hours if the set delivers 15 drops per ml?

IV infusion calculation  An IV has been ordered to run at 10 drops/min. It contains 450mg of a particular drug in a total of 1000ml. How many mg of the drug will the patient receive ...

Alligation Word Problem  A nurse has a 70% alcohol solution and a 30% alcohol solution. How many mL of each should be used to make 400 mL of a 40% alcohol solution?
A. 100mL/70%...

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

Child's dosage calculation question  Dr. prescribed ibuprofen 150 mg PO q 6hrs. for 55lb child. manufacturer's information that accompanies ibuprofen indicated that the recommended dosage ...

Inhaler precription calculation  A physician prescribes the following medication for a patient: Albuterol Inhaler 200 inhalations. 1-2 puffs q 4-6 hours prn asthma..how many days will ...

stock bottle of Amino acid 10%
stock bottle of Dextrose 70%
Stock bottle of 20% lipids

>>>>>>>>>>>>>>>>>>>>>>>>>>>

Need:...

What math formula to use and how do I recognize it?  Ziprasidone for injection yields a 20mg/ml concentration after reconstitution. How many mL would be required for a 10mg dose?

Reply ( by Keith ) The ...

Percentage mixing Problem:   Percentage Problem: a RPh adds 3 g of hydrocortisone to 120 g of a 5% hydrocortisone cream what is the final percentage strength of hydrocortisone in ...

Conversions practice  How many 1 liter bottles do i need to fill 30 five ounce bottles?

Fun with Decimals  A 0.75L bottle of solution is labeled 6% dextrose and 0.75% sodium chloride. How many gm of dextrose are in the bottle of solution? How many grams of sodium ...

calculating flow rates based on body weight  Vibramycin 0.012mg/kg/min in 200ml 5% D/W/IV.
The directions on the label read: "to prepare: add 20ml of sterile water to the 200mg vial and further dilute ...

How many mL should be added?  Patient: 49 year old man weights 252 Lb.
Rx order: 2,000 units/kg Polymixin B sulfate in 300 mL D5W by IV drip. Polymixin B sulfate is available in 10 ...

ml/hr (IV Calculation)  The physician orders regular insulin 11 units/hr. the IV solutions contains 75 units of insulin in 100ml of NS. The iv flow rate should be _____ml /hr

dilution problem I think  Rx. Ceftriaxone 500mg IVPB in D5W 50mL, infuse over 30 min q12h.

The 2g ceftriaxone vial states that if you reconstitute with 8.6mL, the resulting final ...

infusion rate problem  The Dr. Has ordered to add 5g of a Drug "V" to 1L NS. and infuse at a rate of 5000mg/hour. The device delivers 15 gtt/ml. how many gtt/min. will the device ...

conversion of Micrograms  Rx order: Nitroglycerine Infusion 80mcg/min
On hand: Nitroglycerine 0.1% / 500ml Bag
How much would the patient receive in 1 hour?
A. 96mL
B. 72mL
...

Answer for Question 11 on Bonus Quiz 5  Question: How much sodium chloride is in 25 mL of one half normal saline?

Answer: A 1/2 normal saline solution contains 4.5 milligrams of sodium chloride ...

Lotion compounding  How much Clindamycin phospate(150mg/ml)and how much Cetaphil Lotion are needed to prepare the following compound?

Clindamycin phosphate 600mg in Cetaphil ...

non-standard calculations:  The physician orders 1000 mg of amoxicillin to be taken stat and then 500 mg every 8 hours for seven days. On hand you have 500 mg capsules. How many capsules ...

Alligation / Ratio Question  I completed the following problem using the tic tac toe alligation chart, but my answers don't match the answer key. The problem is:

Rx: Prepare 480 ...

Stock Solution Alligation  A patient needs IV infusion of 0.9% NaCl. You have water for injection and 4.5%w/v stock solution of NaCl. There are no displacement volume effects. How ...

Tricky diluent problem   The pharmacy stocks 30g vial of medication. You have directions to add 209mL in order to have a concentration of 1g/9mL. How many milliliters of diluent ...

BUSINESS MATH  QUIZ #4 QUESTION # 14
WHEN I CHECKED MY ANSWER IT WAS WRONG. THERE WAS A CHOICE FOR THE ANSWER I CAME UP WITH. SOMEONE PLEASE TELL ME WHAT TO DO TO ...

Business math in pharmacy  Markup= 12% for AWP less than \$100
Markup= \$5 for AWP \$100 or more
Dispensing fee= \$6 per prescription
Dispensing fee= \$7.50
Compounding fee= \$60 per ...

help please! flow rates/alligations   A patient is to receive lidocaine 2g in 250ml D5W at a rate of 2mg/minute. At what flow rate with this medication be infused? reply (by Keith)
2000mg ...

Concentration Question  A pharmacy technician wishes to add 500 mg of Amino Acids to 500 ml of D5W. The Amino Acid solution is supplied in a 10% concentration. The volume of the ...

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