Dispensing and Compounding Calculations MCQs

by Pharmaexam

Dispensing and compounding pharmacy is a branch of pharmacy, where a pharmacist responsible for dispensing and compounding of medications for the patients. It involves the direct involvement of pharmacists in patient care, working collaboratively with other healthcare professionals to ensure the safe, effective, and appropriate use of medications.

Here we design a quiz test containing 25 MCQs on dispensing and compounding pharmacy calculations. It will help you to prepare for competitive exams or interviews.

Dispensing and Compounding Calculations MCQs

This free quiz test on dispensing and compounding pharmacy calculations will help you to prepare for competitive exams or interviews.

1 / 25

In 25.0 mL of a solution for injection, there are 4.00 mg of the drug. If the dose to be administered to a patient is 200 μg, what quantity (in mL) of this solution should be used?

2 / 25

How many grams of drug substance should be used to prepare 240 g of a 5% w/w solution in water?

3 / 25

A vancomycin solution containing 1000 mg of vancomycin hydrochloride diluted to 250 mL with D5W is to be infused at a constant rate with a continuous-drip intravenous infusion set that delivers 25 drops/mL. What flow rate (drops per minute) should be used to infuse all 250 mL of the vancomycin hydrochloride solution in 2 hrs?

4 / 25

If 120 mL of a 10% stock solution is diluted to 240 mL, what is the final concentration?

5 / 25

If a child’s dose (5 mL) of a cough syrup contains 10 mg of dextromethorphan hydrobromide, what mass of drug is contained in 240 mL?

6 / 25

How many 975 mg tablets of aspirin are required to prepare 100 tablets of 1 grain?

: 100 tablets of 1grain of Aspirin contains: 100 x 65 = 6500 mg of Aspirin.

The number of 975 mg tablets of Aspirin:

= 6500/975 = 6.66 = 7 tablets

7 / 25

How many milligrams are equal to 1/150 grains?

1 grain is equal to 65 mg therefore:

1/150 grains will contain:

= (1 x 65)/150 = 0.43 mg

8 / 25

How many 500 mg tablets of erythromycin are required to prepare 240 cc of 2% solution of erythromycin?

240 cc 2% Erythromycin solution contains:

= (240 x 2)/100 = 4.8 gm of Erythromycin

The number of 500 mg tablets of Erythromycin:

= 4800/500 = 9.6 = 10 tablets.

9 / 25

A vancomycin solution containing 1000 mg of vancomycin hydrochloride diluted to 250 mL with D5W is to be infused at a constant rate with an infusion pump in 2 hrs. What is the rate of drug administration?

10 / 25

How many milliliters of a 1:1500 solution can be made by dissolving 4.8 g of cetylpyridinium chloride in water?

11 / 25

If 10 mg of a drug are added to a 500-mL large-volume parenteral fluid; what should be the rate of flow, in milliliters per hour, to deliver 1 mg of drug per hour?

10 (mg)/1 (mg) = 500 (mL)/X (mL)

X = 50 mL per hour.

12 / 25

A physician orders midazolam hydrochloride (VERSED) 2 mg IV Stat. A pharmacist delivers a vial containing midazolam hydrochloride 5 mg/mL. How many milliliters should be administered?

5 mg/1 mL = 2 mg/X mL;

X = 0.4 mL

13 / 25

If neomycin sulfate has a potency of 600 g of neomycin per milligram, how many milligrams of neomycin sulfate would be equivalent in potency to 1 mg of neomycin?

600 (g of neomycin)/1,000 (g of neomycin) = 1 (mg of neomycin sulfate)/X (mg of neomycin sulfate)

X = 1.67 mg

14 / 25

If a preparation contains 5 g of a drug in 500 mL, how many grams are contained in each tablespoonful dose?

1 tablespoonful = 15 mL

500 (mL)/15 (mL) = 5 (g)/X

X = 0.15 g.

15 / 25

If the dose of a drug is 200 mg, how many doses are contained in 10 g?

10 g = 10,000 mg

Number of doses  10,000 (mg)/200 (mg) = 50 doses.

16 / 25

A solution contains 1.25 mg of a drug per milliliter. At what rate should the solution be infused (drops per minute) if the drug is to be administered at a rate of 80 mg/hr? (1 mL = 30 drops)

17 / 25

The blood of a reckless driver contains 0.1% alcohol. Express the concentration of alcohol in parts per million.

18 / 25

Syrup is an 85% w/v solution of sucrose in water. It has a density of 1.313 g/mL. How many milliliters of water should be used to make 125 mL of syrup?

19 / 25

How many milliliters of a 0.9% aqueous solution can be made from 20.0 g of sodium chloride?

20 / 25

How many capsules, each containing ¼ gr of phenobarbital, can be manufactured if a bottle containing 2 avoirdupois ounces of phenobarbital is available?

21 / 25

If 1 fluid ounce of a cough syrup contains 10 gr of sodium citrate, how many milligrams are contained in 10 mL?

22 / 25

A capsule contains ⅛ gr of ephedrine sulfate, ¼ gr of theophylline, and ¹⁄16 gr of phenobarbital. What is the total mass of the active ingredients in milligrams?

23 / 25

If 3.17 kg of a drug is used to make 50000 tablets, how many milligrams will 30 tablets contain?

24 / 25

How many chloramphenicol capsules, each containing 250 mg, are needed to provide 25 mg/kg/d for 7 days for a person weighing 200 lb?

25 / 25

If a vitamin solution contains 0.5 mg of fluoride ion in each milliliter, then how many milligrams of fluoride ion would be provided by a dropper that delivers 0.6 mL?

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