Pharmaceutical Calculations Practice Test Questions
and Answers All Correct
/. How many milliliters of 8.25% sodium hypochlorite are needed to prepare 500 mL of a
0.55% sodium hypochlorite solution, to be used as a disinfectant? Water will be used as
a diluent. - Answer-33
/.How much 2.5% w/v hydrocortisone cream should be mixed with 360 g of 0.25%
cream to make a 1% hydrocortisone cream? - Answer-180
/.A prescription calls for a 3% sodium chloride intravenous solution. You have a one-liter
bag of sodium chloride injection, 0.9% and a 200 mL vial of sodium chloride injection,
23.4 %. How many mL of sodium chloride injection, 23.4%, will you add to the one-liter
bag of sodium chloride Injection, 0.9%, to prepare the 3% solution? - Answer-103
/.What would be the resulting strength of 500 mL of a 25% v/v ethanol solution is diluted
to 1.2 L? - Answer-10.4
/.What is the percentage strength % w/v of a 90 mL of an aqueous solution containing
200 mg sodium benzoate? - Answer-0.22
/.How many sildenafil 50 mg tablets are required to prepare 25 mL of compounded
0.2% sildenafil otic drops? - Answer-1
/.A vaginal cream contains 0.01% w/w dienestrol. Express this concentration as a ratio
strength, with the first figure in the ratio being 1. - Answer-10,000
/.How many milliliters of a stock solution of 1:750 benzalkonium chloride are required to
prepare 15 mL of a 0.01 % w/v ophthalmic solution? Round to one decimal point. -
Answer-1.1
/.If a clinical study of a new drug demonstrated that the drug met the effectiveness
criteria in 646 patients of the 942 patients enrolled in the study, express these results as
a percent. - Answer-69
/.A cough syrup contains 10 mg of dextromethorphan hydrobromide per 5 mL. How
many milligrams of the drug are contained in a 120-mL container of the syrup? -
Answer-240
/.A pediatric vitamin drug product contains the equivalent of 0.25 mg of fluoride ion in
each milliliter. How many milligrams of fluoride ion would be provided by a dropper that
delivers 0.6 mL? - Answer-0.15
, /.Aripiprazole (ABILIFY) injection is available in single-dose vials containing 9.75 mg of
aripiprazole in each 1.3 mL of injection. Calculate the volume of injection that would
provide a dose of 5.25 mg of aripiprazole. - Answer-0.7
/.An elixir of ferrous sulfate contains 220 mg of ferrous sulfate in each 5 mL. If each
milligram of ferrous sulfate contains the equivalent of 0.2 mg of elemental iron, how
many milligrams of elemental iron would be represented in each 5 mL of the elixir? -
Answer-44
/.T he dosage of the drug thiabendazole (MINT EZOL) is determined in direct proportion
to a patient's weight. If the dose of the drug for a patient weighing 150 pounds is 1.5
grams, what would be the dose for a patient weighing 110 pounds? Round to two
decimal points. - Answer-1.10
/.A penicillin V potassium preparation provides 400,000 units of activity in each 250-mg
tablet. How many total units of activity would a patient receive from taking 4 tablets a
day for 10 days? - Answer-16,000,000
/.The dose of a drug is 0.05 mg for each kilogram of a patient's weight. The drug is
available as an oral liquid containing 50 mcg/0.1 mL. Calculate the dose of the oral
liquid, in milliliters, for a patient who weighs 132 lb. - Answer-6
/.How many milliliters of an injection containing 0.25 mg of drug in each milliliter should
be administered to provide a dose of 10 mcg? - Answer-0.04
/.In a mixture of seven ingredients contains the following approximate weights, what can
you validly record as the approximate total combined weight of the ingredients? Use sig
fig rules.
26.83 grams, 275.3 grams, 2.752 grams, 4.04 grams, 5.197 grams, 16.64 grams, and
0.085 gram. - Answer-330.8
/.A graduate weighs 35.825 g. When 10 mL o water is measured in it, the weight of the
graduate and water is 45.835 g. Calculate the weight o the water, and express any
deviation rom 10 g as percentage of error. - Answer-0.1
/.In compounding a prescription, a pharmacist weighed 0.05 g of a substance on
a balance insensitive to quantities smaller than 0.004 g. What was the maximum
potential error in terms of percentage? - Answer-8
/.A pharmacist attempts to weigh 0.375 g of morphine sulfate on a balance o dubious
accuracy. When checked on a highly accurate balance, the weight is found to
be 0.400 g. Calculate the percentage of error in the first weighing. - Answer-6.67
/.A patient added a 17-g measured dose of polyethylene glycol 3350 (MIRALAX)
to 180 mL of water to use as a laxative. If the volume of the resultant mixture
was 195.6 mL, calculate the specific gravity of the mixture. - Answer-1.01
and Answers All Correct
/. How many milliliters of 8.25% sodium hypochlorite are needed to prepare 500 mL of a
0.55% sodium hypochlorite solution, to be used as a disinfectant? Water will be used as
a diluent. - Answer-33
/.How much 2.5% w/v hydrocortisone cream should be mixed with 360 g of 0.25%
cream to make a 1% hydrocortisone cream? - Answer-180
/.A prescription calls for a 3% sodium chloride intravenous solution. You have a one-liter
bag of sodium chloride injection, 0.9% and a 200 mL vial of sodium chloride injection,
23.4 %. How many mL of sodium chloride injection, 23.4%, will you add to the one-liter
bag of sodium chloride Injection, 0.9%, to prepare the 3% solution? - Answer-103
/.What would be the resulting strength of 500 mL of a 25% v/v ethanol solution is diluted
to 1.2 L? - Answer-10.4
/.What is the percentage strength % w/v of a 90 mL of an aqueous solution containing
200 mg sodium benzoate? - Answer-0.22
/.How many sildenafil 50 mg tablets are required to prepare 25 mL of compounded
0.2% sildenafil otic drops? - Answer-1
/.A vaginal cream contains 0.01% w/w dienestrol. Express this concentration as a ratio
strength, with the first figure in the ratio being 1. - Answer-10,000
/.How many milliliters of a stock solution of 1:750 benzalkonium chloride are required to
prepare 15 mL of a 0.01 % w/v ophthalmic solution? Round to one decimal point. -
Answer-1.1
/.If a clinical study of a new drug demonstrated that the drug met the effectiveness
criteria in 646 patients of the 942 patients enrolled in the study, express these results as
a percent. - Answer-69
/.A cough syrup contains 10 mg of dextromethorphan hydrobromide per 5 mL. How
many milligrams of the drug are contained in a 120-mL container of the syrup? -
Answer-240
/.A pediatric vitamin drug product contains the equivalent of 0.25 mg of fluoride ion in
each milliliter. How many milligrams of fluoride ion would be provided by a dropper that
delivers 0.6 mL? - Answer-0.15
, /.Aripiprazole (ABILIFY) injection is available in single-dose vials containing 9.75 mg of
aripiprazole in each 1.3 mL of injection. Calculate the volume of injection that would
provide a dose of 5.25 mg of aripiprazole. - Answer-0.7
/.An elixir of ferrous sulfate contains 220 mg of ferrous sulfate in each 5 mL. If each
milligram of ferrous sulfate contains the equivalent of 0.2 mg of elemental iron, how
many milligrams of elemental iron would be represented in each 5 mL of the elixir? -
Answer-44
/.T he dosage of the drug thiabendazole (MINT EZOL) is determined in direct proportion
to a patient's weight. If the dose of the drug for a patient weighing 150 pounds is 1.5
grams, what would be the dose for a patient weighing 110 pounds? Round to two
decimal points. - Answer-1.10
/.A penicillin V potassium preparation provides 400,000 units of activity in each 250-mg
tablet. How many total units of activity would a patient receive from taking 4 tablets a
day for 10 days? - Answer-16,000,000
/.The dose of a drug is 0.05 mg for each kilogram of a patient's weight. The drug is
available as an oral liquid containing 50 mcg/0.1 mL. Calculate the dose of the oral
liquid, in milliliters, for a patient who weighs 132 lb. - Answer-6
/.How many milliliters of an injection containing 0.25 mg of drug in each milliliter should
be administered to provide a dose of 10 mcg? - Answer-0.04
/.In a mixture of seven ingredients contains the following approximate weights, what can
you validly record as the approximate total combined weight of the ingredients? Use sig
fig rules.
26.83 grams, 275.3 grams, 2.752 grams, 4.04 grams, 5.197 grams, 16.64 grams, and
0.085 gram. - Answer-330.8
/.A graduate weighs 35.825 g. When 10 mL o water is measured in it, the weight of the
graduate and water is 45.835 g. Calculate the weight o the water, and express any
deviation rom 10 g as percentage of error. - Answer-0.1
/.In compounding a prescription, a pharmacist weighed 0.05 g of a substance on
a balance insensitive to quantities smaller than 0.004 g. What was the maximum
potential error in terms of percentage? - Answer-8
/.A pharmacist attempts to weigh 0.375 g of morphine sulfate on a balance o dubious
accuracy. When checked on a highly accurate balance, the weight is found to
be 0.400 g. Calculate the percentage of error in the first weighing. - Answer-6.67
/.A patient added a 17-g measured dose of polyethylene glycol 3350 (MIRALAX)
to 180 mL of water to use as a laxative. If the volume of the resultant mixture
was 195.6 mL, calculate the specific gravity of the mixture. - Answer-1.01
