Pharmacokinetics Practice Questions With
Correct Answers
What are the 4 parts of pharmacokinetics? - CORRECT ANSWER✔✔-Absorption
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Distribution
Metabolism
Elimination
What are the primary determinants of drug clearance? - CORRECT ANSWER✔✔-
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Blood flow to organ
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Organ efficiency at extraction
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A drug has a half-life of 6 hours. If a patient takes a 300 mg dose, how much of
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the drug will remain in their body after 18 hours?
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A) 150 mg
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B) 75 mg
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C) 37.5 mg
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D) 18.75 mg - CORRECT ANSWER✔✔-C) 37.5 mg
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,Drug X has a half-life of 2 days. If a patient takes 500 mg of Drug X, how much will
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remain in their system after 8 days?
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A) 62.5 mg
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B) 125 mg
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C) 250 mg
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D) 31.25 mg - CORRECT ANSWER✔✔-D) 31.25 mg
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A medication has a half-life of 3 hours. If a patient takes 400 mg of the drug, how
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much will be left in their system after 9 hours?
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A) 50 mg| | |
B) 100 mg
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C) 200 mg
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D) 25 mg - CORRECT ANSWER✔✔-A) 50 mg
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Drug Y has a half-life of 12 hours. If a patient takes 300 mg of Drug Y, how much
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will remain in their system after 36 hours?
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A) 50 mg| | |
B) 150 mg
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C) 75 mg| | |
D) 37.5 mg - CORRECT ANSWER✔✔-D) 37.5 mg
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If a drug with a half-life of 6 hours is administered to a patient, how long will it
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take for the drug's concentration to decrease from 400 mg to 50 mg?
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A) 6 hours
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, B) 12 hours
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C) 18 hours
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D) 24 hours - CORRECT ANSWER✔✔-C) 18 hours
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A medication has a half-life of 18 hours. If a patient takes 300 mg of the drug,
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how long will it take for the concentration to decrease to 75 mg in the body?
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A) 6 hours
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B) 18 hours
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C) 36 hours
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D) 54 hours - CORRECT ANSWER✔✔-C) 36 hours
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If a medication has a half-life of 10 minutes, how long will it take for the
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concentration to decrease to 12.5 mg after a 100 mg dose?
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A) 10 minutes
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B) 20 minutes
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C) 30 minutes
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D) 40 minutes - CORRECT ANSWER✔✔-C) 30 minutes
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In first order kinetics, plasma drug concentrations decrease
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|(linearly/exponentially) with time resulting in a constant (percentage/amount) of | | | | | | | | |
the drug eliminated. - CORRECT ANSWER✔✔-Decrease exponentially
| | | | | |
Constant percentage |
Correct Answers
What are the 4 parts of pharmacokinetics? - CORRECT ANSWER✔✔-Absorption
| | | | | | | | |
Distribution
Metabolism
Elimination
What are the primary determinants of drug clearance? - CORRECT ANSWER✔✔-
| | | | | | | | | |
Blood flow to organ
| | |
Organ efficiency at extraction
| | |
A drug has a half-life of 6 hours. If a patient takes a 300 mg dose, how much of
| | | | | | | | | | | | | | | | | | |
the drug will remain in their body after 18 hours?
| | | | | | | | |
A) 150 mg
| | |
B) 75 mg
| | |
C) 37.5 mg
| | |
D) 18.75 mg - CORRECT ANSWER✔✔-C) 37.5 mg
| | | | | | |
,Drug X has a half-life of 2 days. If a patient takes 500 mg of Drug X, how much will
| | | | | | | | | | | | | | | | | | |
remain in their system after 8 days?
| | | | | | |
A) 62.5 mg
| | |
B) 125 mg
| | |
C) 250 mg
| | |
D) 31.25 mg - CORRECT ANSWER✔✔-D) 31.25 mg
| | | | | | |
A medication has a half-life of 3 hours. If a patient takes 400 mg of the drug, how
| | | | | | | | | | | | | | | | | |
much will be left in their system after 9 hours?
| | | | | | | | |
A) 50 mg| | |
B) 100 mg
| | |
C) 200 mg
| | |
D) 25 mg - CORRECT ANSWER✔✔-A) 50 mg
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Drug Y has a half-life of 12 hours. If a patient takes 300 mg of Drug Y, how much
| | | | | | | | | | | | | | | | | | |
will remain in their system after 36 hours?
| | | | | | |
A) 50 mg| | |
B) 150 mg
| | |
C) 75 mg| | |
D) 37.5 mg - CORRECT ANSWER✔✔-D) 37.5 mg
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If a drug with a half-life of 6 hours is administered to a patient, how long will it
| | | | | | | | | | | | | | | | | |
take for the drug's concentration to decrease from 400 mg to 50 mg?
| | | | | | | | | | | |
A) 6 hours
| | |
, B) 12 hours
| | |
C) 18 hours
| | |
D) 24 hours - CORRECT ANSWER✔✔-C) 18 hours
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A medication has a half-life of 18 hours. If a patient takes 300 mg of the drug,
| | | | | | | | | | | | | | | | |
how long will it take for the concentration to decrease to 75 mg in the body?
| | | | | | | | | | | | | | |
A) 6 hours
| | |
B) 18 hours
| | |
C) 36 hours
| | |
D) 54 hours - CORRECT ANSWER✔✔-C) 36 hours
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If a medication has a half-life of 10 minutes, how long will it take for the
| | | | | | | | | | | | | | | |
concentration to decrease to 12.5 mg after a 100 mg dose?
| | | | | | | | | |
A) 10 minutes
| | |
B) 20 minutes
| | |
C) 30 minutes
| | |
D) 40 minutes - CORRECT ANSWER✔✔-C) 30 minutes
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In first order kinetics, plasma drug concentrations decrease
| | | | | | |
|(linearly/exponentially) with time resulting in a constant (percentage/amount) of | | | | | | | | |
the drug eliminated. - CORRECT ANSWER✔✔-Decrease exponentially
| | | | | |
Constant percentage |
