PTCB Calculations

You are filling a prescription that reads: Amoxicillin 125 mg/5 ml, Sig 1 tsp t.i.d. Dispense 150 mL. How many mL should the patient take each day?

15 mL

You are filling a prescription that reads: EES 200, Sig 1 tsp t.i.d. Dispense 150 mL. How many days should this prescription last?

10 days

A compound prescription calls for 600 g of white petrolatum. How many 1 lb. jars should you obtain so there is enough to prepare this prescriptions?

2 jars

Each tablet of Tylenol #3 has 30 mg of codeine. How many grains of codeine are in each tablet of Tylenol #3?

1/2 grain

One form of influenza vaccine, the Live Attenuated Intranasal Vaccine, must be stored at -15C. What temperature is this in degrees F?

5F

The lead pharmacy tech must reorder billing forms when 80% of the case has been used. A full case of billing forms contains 20 packages of forms. How many packages of forms should be should be remaining when its time to reorder?

4 packages

In reconstituting a liquid antibiotics, 90 mL of distilled water should be used. If 1/3 of the water should be added first to moisten the powder, how much water should be added?

30 mL

How many capsules of clindamycin hydrochloride should be used to prepare 30 mL if each capsule contains 150 mg of clindamycin hydrochloride?

clindamycin hydrochloride 600mg

70% isopropyl alcohol qs ad 60 mL

2 capsules

A prescription is written for ibuprofen 10% cream. How much ibuprofen is needed to make 20 g of the cream?

2 g

You are entering a prescription for an albuterol inhaler that delivers 90 mcg per actuation. If each container delivers 200 actuations and each dose is two actuations, how many mg are delivered in each dose?

0.09 mg

What is the days supply for a Z-pac that contains 6 azithromyacin 250 mg tablets, with directions of 500 mg on the first day, followed by 250 mg one a day until gone?

5

What is the day's supply for metronidazole vaginal gel 70 g, Sig 5g twice daily?

7 days

What is the days supply for Humulin N insulin 20 mL, if the dose is 40 U daily?

50 days

How much change should be given to a patient who gives you $50 to pay for 3 prescriptions if the patient's prescription plan has a $10 co-pay?

$20

What is the gross profit for a prescription if the selling price is $73.14, the aquisition cost is $50.10, and the AWP is $65.12?

$21.04

A prescription has been written for tamsulosin 0.4 mg #100, Sig i cap qd, 2 refills; however, the patients insurance benefit has a 34 day supply limit. If the original prescription is filled for 34 capsules, how many refills of 34 would be available?

7 refills of 34

You are preparing a prescription for Synthroid 0.1 mg tablets. How many mcg are in each tablet?

100 mcg

You are entering a prescription for timolol 0.25% ophthalmic solution 5 mL, Sig i gtt o.u. bid. How many days should this bottle last if the dropper delivers 20 drops of timolol 0.25% per mL?

25 days

The dose of a drug is 250 mcg per kg of body weight. What dose should be given to child that weighs 55 lbs?

6.25 mg

A physician has ordered 15 mL of Brand X antacid suspension to be taken qid. How many days will a 12oz. bottle last?

6 days

How many mcg of digoxin are in 0.4 mL of digoxin solution if the strength of the digoxin solution is 50 mcg per mL?

20 mcg

You are filling a prescription for gentamicin 80 mg. How much gentamicin solution should be measured from 2 mL vial of gentamicin 40 mg/mL?

2 mL

45 U of Humulin R insulin are to be added to a TPN bag. How much Humulin R is needed?

0.45 mL

How much potassium chloride solution (2 mEq/mL) should be added to a 1 liter IV bag if 25 mEq of potassium chloride is needed?

12.5 mL

How much sodium chloride is in 25 mL of normal saline?

225 mg

A drug is in a vial that contains 500 mg of the drug in 2 mL of solution. What is the percent strength of this drug?

25%

You have dissolved 20 g of drug 500 mL of solution. What is the percent strength of the resulting solution?

4%

How many capsules are needed to prepare 30 mL of 1% clindamycin hydrochloride solution if each capsule contains 150 mg of clindamycin hydrochloride?

2 capsules

How much 1% lidocaine is needed to fill an order for 30 mg of lidocaine?

3 mL

What percentage strength of a 1:100 solution?

1%

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

10 mg

How much vancomycin should be given per dose for a child that weighs 32 lbs if the dose is 10 mg/kg q6h IV?

145 mg

A patient is to receive 100 mg/kg/day of ampicillin. What is the total daily dose for a patient that weighs 40 lbs?

1.8 g

If 250 mg of penicillin VK is equivalent to 400,000 U of penicillin, how many U of penicillin are in 1 mg of penicillin VK?

1,600 U

A nomogram has been used to determine a patient's BSA is 1.95. If the dose of a drug is 40 mg/sq meter, how much drug should be administered per dose?

78 mg

A 500 mL IV bag is administered over 4 hours. What is the infusion rate?

125 mL/hr

A 500 mL IV bag is infused at a rate of 100 mL/hr. How long will this bag last?

5 hrs

An IV has been running at 80 mL/hr for 5 hrs and 20 min. How much solution has the patient received?

427 mL

An IV is set to deliver 30 gtt/min. What is the infusion rate in mL/hr if there are 1.5 gtt/mL?

120 mL/hr

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

150 mL

How many tsp equals 20 mL?

4

If a prescription reads: Aspirin 5 gr, dispense 100 tablets, 1 tablet q 4-6h prn headache, what is the dose in mg?

325

How many gallons of Coca Cola fountain syrup are needed to package 150 bottles of 120 mL per bottle?

5

If a prescription reads: Amoxicillin 250 mg/5 mL, dispense 150 mL, 375 mg tid x 5 days, what is the dose in household units?

1.5 tsp

How many mL are in 2 L of normal saline?

2,000

How many mL of KCI 2 mEq/mL are needed if the dose is 30 mEq?

15

How many mL of 25% dextrose are needed to prepare 500 mL of 40% dextrose if you are to prepare 40% dextrose from 25% dextrose and 60% dextrose?

286 mL

If 1 L is infused over 8 hrs, what is the rate of infusion in mL/hr?

125

A patient weighs 121 lbs. What is the patients weight in kg?

55

How many grams of sodium bicarbonate are needed to make 400 mL of a 1:1,000 w/v solution?

0.4

Temperature: Fahrenheit to Celsius

Fahrenheit = (1.8 x Celsius) + 32

Temperature: Celsius to Fahrenheit

Celsius = (Fahrenheit - 32) / 1.8