**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:

Please help.

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

Reply: (by Keith)

#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?

reply (by Keith): Heather,...

**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 ...

** (TPN) Dilutions**
Please Help me solve this....

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 ...