PTCB Pharm Calc Review

Neupogen 480 mcg/1.6 mL; how many milligrams are contained in this vial?

0.48 mg

Write 2/3 as a decimal fraction:__________

0.667

0.75% (v/v) =__________

0.75 mL/100 mL

A liter of NS contains 9,000 mg of sodium chloride. Express this as a percent.

0.9%

A suspension of naladixic acid contains 250 mg/5 mL. The syringe contains 20 mL. How many grams of naladixic acid does the syringe contain?

1 gram

45 mL =__________ oz

1 ½ oz

1 L =__________ mL

1,000 mL

1 mg =__________ mcg

1,000 mcg

A patient has two IVs running: an aminophylline drip at 22 mL/hr and saline at 40 mL/hr. How much fluid is the patient receiving per day from his IVs?

1,488 mL per day

A chemotherapy agent is available in a 5 mg/mL solution. The recommended dose is 25 mg/m2. What should the dose in milliliters be for a child if the child is 0.24 m2?

1.2 mL (which is 6 mg)

Express 1 1/4 in decimal form:__________

1.25

You have a 2-gram vial of dry powder antibiotic, and you are directed to prepare a 100-mg/mL concentration by adding 18.7 mL of diluent. What is the PV of the powder?

1.3 PV

Potassium chloride 20 mEq/liter runs at a rate of 100 mL/hr. How long will the liter bag last? How many mEq of potassium chloride will the patient receive per hour?

10 hours; 2 mEq/hr

The standard receipe for progesterone vaginal suppositories is:Progesterone 3.4 gPolyethylene glycol 3350 22 gPolyethylene glycol 1000 90 gYield 30 Supp. You are ordered to make 90 suppositories. How many grams of progesterone will you need?

10.2g

The pharmacy receives an order for 500 mL D15W. Using 70% dextrose and sterile water, how much of each will you need?

107 mL of 70% 393 mL sterile water

How many grams of lidocaine 20% ointment and how many grams of ointment base must be combined to prepare 2 lb of 2.5% lidocaine topical ointment?

113.5 g of 20% 794.5 g of base

12% (w/v) =__________

12 g/100 mL

You receive an order for a liter of TPN solution containing 2.5% Liposyn, and the stock is 20%. How much 20% Liposyn do you need?

125 mL

Convert XIV to its Arabic equivalent:__________

14

Retin A 0.025% gel in 2-oz tubes are available; how many milligrams of tretinoin are in the 2-oz tube?

15 mg

3 tbsp =__________ mL

45 mL

Write 0.45 as a percentage:__________

45%

Patient has Lantus 100 units/mL in 3-mL cartridges. The patient is ordered to use 46 units daily; how many cartridges will the patient need for a 30-day supply?

5 cartridges

A syringe is labeled "inamrinone 5 mg/mL, 10 mL." How many milligrams of inamrinone are in the syringe?

50 mg

RX: Diflucan 100-mg scored tablets Sig: iii now, then 3 mg/kg BID X 10 days is ordered. The patient weighs 183 lb; how many tablets must be dispensed?

53 tablets (2½ tabets per dose X the 10 days plus the 3 stat pills)

If a patient is receiving an IV solution containing 20,000 units of heparin in 500 mL D5NS at a rate of 25 mL/hr with a tubing set that delivers 15 gtt/mL. What is the drip rate in gtt/min?

6.25 = 6 gtt/min

A patient weighing 60 kg is to receive a drug with a recommended dose of 20 mg/kg/day in two equally divided doses. How many milligrams should the patient receive per dose?

600 mg/dose

Write the fraction form of 0.65:__________

65/100 = 13/20

Medication: Dopamine 1800 mcg in 500 mL D5W. Patient is to receive 4 mcg/min. How many mL/hr should the patient receive?

66.67 = 67 mL/hr

Potassium chloride is supplied in 30-mL vials containing 2 mEq/mL of potassium. An IV order requires 34 mEq of potassium. How many milliliters need to be added?

17 mL

RX: Celebrex 200 mg PO BID for arthritis pain; dispense 3 month supply. How many Celebrex 200-mg capsules should be dispensed?

180 capsules

Convert III to its Arabic equivalent:__________

3

100 mL =__________ L

0.1 L

Calculate the amounts of boric acid and zinc sulfate in grams to fill the following prescription:Zinc sulfate 0.1%Boric acid 1:10Distilled water qs. ad 100 mL

0.1 g zinc sulfate 10 g boric acid

How many grams of betamethazsone are in 120 g of 0.1% betamethasone cream?

0.12 g

A physician orders a 5% ophthalmic ointment. How much drug and how much ophthalmic base (in grams) would be needed to prepare a 3-g tube of ointment?

0.15 g of drug 2.85 g of base

Heparin 10,000 units/mL solution, patient is ordered 2,500 units. How many milliliters should the patient receive?

0.25 mL

1 mL =__________ L

0.001 L

1 mg =__________ g

0.001 g

1 g =__________ kg

0.001 kg

1 m =__________ km

0.001 km

1 mcg =__________ mg

0.001 mg

How many grams of epinephrine are necessary to prepare 20 mL of a 1:1,000 epinephrine solution?

0.02 g

Express 1:5000 as a percent.

0.02%

1/2 NS =__________ g NaCl/__________ mL solution

0.45 g/100 mL

Express 0.05% as a ratio.

1:2000

Use the following concentrations to solve the problems:Gentamicin 80 mg/mLMagnesium sulfate 50%Atropine 1:200160 mg gentamicin =__________ mL10 mg atropine =__________ mL __________ g magnesium sulfate = 120 mL

2 mL 2 mL 60 g

6 tsp =__________ tbsp

2 tbsp

If 2,400 mg of tobramycin powder is dissolved in 120 mL of water, what is the percent strength of the solution?

2%

Furosemide oral solution 10 mg/mL is available. A patient is ordered to take 25 mg daily. What volume should the patient take and how many days will a 4-oz bottle last?

2.5 mL per dose; will last 48 days

Prepare a 10-mL dilution of dexamethasone with a 1-mg/mL concentration using a 4-mg/mL stock. How much stock and how much water will you need?

2.5 mL stock; 7.5 mL water

Medication is ordered at 4 mg/kg daily per IV over 1 hour. The patient weighs 195 lb. The drug is available in a 250-mg/2-mL vial.How many mL of drug is needed?

2.8 mL

Write the fraction form of 0.4:__________

2/5

A patient is receiving a total daily dose of 1 g of acyclovir. How many milligrams of acyclovir is he receiving per dose if he takes the drug five times a day?

200 mg per dose

Express XXIV in Arabic numbers:__________

24

How many grams of coal tar must be added to 1 lb of 10% coal tar to make a 15% ointment?

26.7 g

1 fl oz =__________ mL

29.57 (30) mL

An IV fluid is running at 125/hr. How many liter bags will the patient need for 24 hours?

3 bags

If an IV is running at 100 mL/hr, how many liter bags are needed for 24 hours?

3 one liter bags

1 TBS =__________ tsp

3 tsp

15 mL =__________ tsp

3 tsp

A drug is available in 1 g vials with a concentration of 125 mg/2 mL. If the directions state to add 12.6 mL of diluent, what is the powder volume?

3.4 mL PV

4% (w/w) =__________

4 g/100 g

A patient is to receive 40 mg of an antibiotic in 25 mL of D5W to run over 60 min. If the nurse uses a 10 gtt/mL tubing set, what is the drip rate in gtt/min?

4 gtt/min

You are to add 12 mM of potassium phosphate to a TPN order. Potassium phosphate is available in a 45 mM/15 mL vial. How many milliliters should be added?

4 mL

2 kg =__________ lb

4.4 lb

The recommended dose of sterioid for replacement therapy is 2 mg/m2 per dose. The drug is administered twice daily. What is the daily prednisone dose for a 1.2-m2 person?

4.8 mg per day

Humulin N 100 units/mL 10-mL vials are available. The patient has a prescription that reads "10 units Q AM and 15 units Q PM." How many days will the vial last?

40 days

Keflex suspension 500 mg PO QID is ordered. The inpatient pharmacy has a 200-mL bottle with a concentration of 250 mg/5 mL available. How many mL must the inpatient pharmacy send up for a 24-hour supply? How many days will the 200 mL bottle last?

40 mL for 24 hours 200 mL will last 5 days

A loading dose of an anticonvulsant medication for children is 20 mg/kg and infused at a rate of 0.5 mg/kg per minute; over how many minutes would a dose be administered for a child weighing 50 lb?

40 minutes

Express 2/5 as a percentage:__________

40%

Amoxicillin is supplied 400 mg/5 mL; based on the recommended dose of 50 mg/kg/day in 3 divided doses, how many milligrams of drug should a 55-lb child receive per dose?

416.67 mg/dose

Express 42% as a fraction:__________

42/100 = 21/50

425 grams of sucrose is added to 500 mL of water with a resulting volume of 850 mL; express the concentration of sucrose as a w/w and a w/v product.

425/925 = 45.9% w/w 425/850 = 50% w/v

If a patient takes one tablespoonful of Maalox TID, ac and hs, how long will a 16-oz bottle last?

8 days

Midazolam 5 mg/mL is available. A patient is ordered to receive 40 mg every 4 hours as needed. What should the volume of the dose be?

8 mL

How many tablets have to be dispensed for the following prescription?Obecalp ii tablets tid for 14 days

84 tablets

How many grams of sodium chloride are in a liter of NS?

9 grams

Cyclosporin 100 mg/mL is available. You have an order for 140-lb patient for 15 mg/kg; how many mL will the patient need?

9.55 mL

A TPN order needs sodium chloride 40 mEq and potassium chloride 10 mEq. Stock solutions are sodium chloride 4 mEq/mL and potassium chloride 2 mEq/mL. How much of each is required to fill the order?

Sodium chloride 10 mL potassium chloride 5 mL

The prescription reads digoxin 0.125 mg daily, and on hand is digoxin 125 mcg. How should the directions on the prescription label read?

Take one tablet daily

Lamictal has a recommended maintance dose for children of 4.75-7.5 mg/kg/day in two divided doses. You have a prescription for a 60-lb child for Lamictal 100 mg BID; is the ordered dose within the recommended dose?

Yes the recommended dose for this weight is 60-102 mg per dose.

The technician has a solution labeled "D10NS."How many grams of NaCl are in 100 mL of this solution?How many milliliters of this solution contain 10 g dextrose?

a. 0.9 g b. 100 mL

You are to prepare 2 oz of folic acid 100 mcg/mL using a stock of folic acid 5 mg/mLHow much folic acid, in milliliters, do you need?How much diluent, in milliliters, do you need?

a. 1.2 mL folic acid b. 58.8 mL diluent

Zofran is available in a 100-mL bottle containing 4 mg/5 mL. The patient is taking 10 mg q 12 hours.How many mL should this patient take per dose?What is the estimated days supply (EDS) of the 100-mL bottle?

a. 12.5 mL per dose b. 4 days

An IV solution is ordered requiring 250 mL of Drug AX 15%. The stock of Drug AX 20% is available.How many milliliters of concentrate are needed?How many milliliters of diluent are needed?

a. 187.5 mL concentrate b. 62.5 mL diluent

Metformin is available in 500-mg tablets. The prescription reads: "750 mg Q AM & PM."How many tablets should the patient take per dose?How many tablets must be dispensed for a 1-month supply?

a. 1½ tablets b. 90 tablets

A drug order requires 50 mL of a 2% neomycin solution.How much neomycin concentrate (1 g/2 mL) is needed to fill the order?How many milliliters of sterile water need to be added to the concentrate before dispensing the drug?

a. 2 mL stock solution b. 48 mL stock solution

The technician needs to prepare 2 L of 0.25% acetic acid irrigation solution. The stock concentration of acetic acid is 25%.How many milliliters of stock solution are needed?How many milliliters of sterile water have to be added?

a. 20 mL stock solution b. 1,980 mL sterile water

Orders are received for a 1.5 L TPN for an adult; the order reads:Dextrose 17%Aminosyn 3%Liposyn 2.5%Sterile water QSAD 1500 mLSodium chloride 15 mEq/LPotassium chloride 15 mEq/LPotassium phosphate 10 mM/LMagnesium sulfate 10 mEq//LMVI 10 mL/dayOn hand Dextrose 70%Aminosyn 10%Lipsyn 20%Sodium chloride 4 mEq/mLPotassium chloride 2 mEq/mLPotassium phosphate 3 mM/mLMagnesium phosphate 4.06 mEq/mLMVI 10 mL vialCalculate the amount of each of the stock ingredients and how much sterile water will be needed:DextroseAminosynLiposynSodium chloridePotassium chloridePotassium phosphateMagnesium sulfateMVISterile water

a. 364.3 mL of 70% dextrose b. 450 mL of 10% aminosyn c. 187.5 mL of 20% liposyn d. 5.625 mL of sodium chloride e. 11.25 mL of potassium chloride f. 5 mL of potassium phosphate g. 3.7 mL magnesium sulfate h. 10 mL MVI i. 462.623 mL of sterile water (Note the order for sodium and potassium additives states/L and you are making 1.5 L.)

A patient has a BSA of 1.15 m2. The recommended dose of the ordered drug is 20 mg/m2 in 4 divided doses.How many micrograms would the patient receive per dose?How many milligrams would the patient receive per day?

a. 5,750 mcg/dose b. 23 mg/day

Calculate the amount of atropine stock solution (concentration 0.5%) needed to compound the following prescription:Atropine sulfate 1:1,000Sterile water qs ad 300 mLHow much sterile water has to be added to complete the order?

a. 60 mL stock solution b. 240 mL sterile water

A patient is ordered to take 150 mg of tegretol daily for 30 days. The supply on hand is carbamazepine 100 mg/5 mL. a. How many milliliters should the patient receive per dose? b. How many milliliters should be dispensed?

a. 7.5 mL b. 225 mL

The recommended dose of erythromycin to treat an ear infection is 50 mg/kg per day given q6h. Answer the following questions regarding this drug:If a child weighs 15 kg, how much erythromycin should he receive per day?How much drug will he receive per dose?

a. 750 mg per day b. 187.5 mg per dose

A child with an opiate overdose needs naloxone. The recommended starting dose is 5-10 mcg/kg. The doctor writes for "0.3 mg naloxone stat." Answer the following questions on the basis of the child's weight of 35 kg:What range of doses, in mcg, could be used to start therapy in this child?On the basis of the answer to "a," does 0.3 mg sound like a reasonable dose?

a. Acceptable dosage range: 175-350 mcg b. Yes, it falls within the accepted calculated range.

You receive an order for amoxicillin 400 mg BID × 10 days for a child. Your supply is amoxicillin 400 mg/5 mL.How should the directions on the prescription label read? How many milliliters must be dispensed?

a. Give one teaspoonful twice a day for 10 days. b. 100 mL

Trileptal 300 mg/5 mL is ordered for a prescription with the directions of 450 mg BID.How should the directions on the prescription label read?How many milliliters must be dispensed to provide a 30-day supply?

a. Take 7.5 mL or 1 1/2 teaspoonfuls twice a day. b. 450 mL

The standard metric system measure for weight is the__________ .

gram

The standard metric system measure for volume is the__________ .

liter

The standard metric system measure for length is the__________ .

meter