NR566 Advanced Pharmacology for Care of the
Family Exam 1 Version 3 Questions with Correct
Answers and Expert Explanation for Each Question
1. When a drug is highly protein-bound, what occurs when a patient’s albumin levels
are low?
A. The drug remains in the intravascular space longer.
B. There is an increase in the free, active drug concentration.
C. The drug becomes inactive and is excreted faster.
D. The therapeutic effect of the drug is significantly diminished.
Correct Answer: B
Expert Explanation: Albumin is the primary protein to which drugs bind in the
bloodstream. If albumin levels are low, there are fewer binding sites available for
the drug, leading to a higher concentration of ‘free’ or unbound drug. This free drug
is pharmacologically active and can lead to increased therapeutic effects or toxicity.
2. Which of the following describes the ‘first-pass effect’?
A. The rapid excretion of drugs through the kidneys upon first entry.
B. The metabolic breakdown of an oral drug in the liver before it reaches systemic
circulation.
C. The absorption of a drug from the stomach into the bloodstream.
,D. The initial distribution of a drug to highly vascularized organs.
Correct Answer: B
Expert Explanation: The first-pass effect occurs when an orally administered drug
is absorbed from the gastrointestinal tract and carried to the liver via the portal
vein. In the liver, a significant portion of the drug may be metabolized before it ever
reaches the rest of the body. This process reduces the overall bioavailability of the
medication.
3. According to the Beers Criteria, which class of medication should be avoided in
older adults due to high risk of falls and fractures?
A. Proton pump inhibitors
B. Thiazide diuretics
C. Benzodiazepines
D. ACE inhibitors
Correct Answer: C
Expert Explanation: Benzodiazepines increase the risk of cognitive impairment,
delirium, falls, and fractures in the elderly population. The Beers Criteria specifically
lists them as potentially inappropriate medications for older adults. Prescribers
should look for safer alternatives to manage anxiety or insomnia in this
demographic.
,4. A drug with a narrow therapeutic index (TI) requires which of the following?
A. Infrequent dosing due to long half-life.
B. Administration only via the intravenous route.
C. A loading dose to reach steady state quickly.
D. Close monitoring of blood levels to avoid toxicity.
Correct Answer: D
Expert Explanation: The therapeutic index is the ratio between the toxic dose and
the effective dose of a drug. A narrow index means that the difference between a
therapeutic dose and a toxic dose is very small. Consequently, patients must be
monitored closely with lab tests to ensure levels stay within a safe range.
5. Which phase of drug metabolism involves conjugation reactions that make drugs
more water-soluble for excretion?
A. Phase II
B. Phase I
C. Phase III
D. Phase IV
Correct Answer: A
, Expert Explanation: Phase II metabolism involves conjugation, where a functional
group like glucuronic acid is attached to the drug. This process significantly
increases the water solubility of the molecule, facilitating its excretion through the
bile or urine. Phase I typically involves oxidation, reduction, or hydrolysis via the
CYP450 system.
6. Which pharmacokinetic change is commonly seen in geriatric patients?
A. Increased total body water
B. Increased lean muscle mass
C. Increased hepatic blood flow
D. Increased percentage of body fat
Correct Answer: D
Expert Explanation: As patients age, their body composition changes, typically
showing an increase in adipose tissue (fat) and a decrease in total body water and
lean mass. These changes affect the distribution of lipophilic drugs, which may have
a prolonged half-life in older adults. Understanding these physiological shifts is
crucial for safe prescribing in geriatrics.
7. What is the primary site of drug excretion in the human body?
A. Lungs
B. Kidneys
Family Exam 1 Version 3 Questions with Correct
Answers and Expert Explanation for Each Question
1. When a drug is highly protein-bound, what occurs when a patient’s albumin levels
are low?
A. The drug remains in the intravascular space longer.
B. There is an increase in the free, active drug concentration.
C. The drug becomes inactive and is excreted faster.
D. The therapeutic effect of the drug is significantly diminished.
Correct Answer: B
Expert Explanation: Albumin is the primary protein to which drugs bind in the
bloodstream. If albumin levels are low, there are fewer binding sites available for
the drug, leading to a higher concentration of ‘free’ or unbound drug. This free drug
is pharmacologically active and can lead to increased therapeutic effects or toxicity.
2. Which of the following describes the ‘first-pass effect’?
A. The rapid excretion of drugs through the kidneys upon first entry.
B. The metabolic breakdown of an oral drug in the liver before it reaches systemic
circulation.
C. The absorption of a drug from the stomach into the bloodstream.
,D. The initial distribution of a drug to highly vascularized organs.
Correct Answer: B
Expert Explanation: The first-pass effect occurs when an orally administered drug
is absorbed from the gastrointestinal tract and carried to the liver via the portal
vein. In the liver, a significant portion of the drug may be metabolized before it ever
reaches the rest of the body. This process reduces the overall bioavailability of the
medication.
3. According to the Beers Criteria, which class of medication should be avoided in
older adults due to high risk of falls and fractures?
A. Proton pump inhibitors
B. Thiazide diuretics
C. Benzodiazepines
D. ACE inhibitors
Correct Answer: C
Expert Explanation: Benzodiazepines increase the risk of cognitive impairment,
delirium, falls, and fractures in the elderly population. The Beers Criteria specifically
lists them as potentially inappropriate medications for older adults. Prescribers
should look for safer alternatives to manage anxiety or insomnia in this
demographic.
,4. A drug with a narrow therapeutic index (TI) requires which of the following?
A. Infrequent dosing due to long half-life.
B. Administration only via the intravenous route.
C. A loading dose to reach steady state quickly.
D. Close monitoring of blood levels to avoid toxicity.
Correct Answer: D
Expert Explanation: The therapeutic index is the ratio between the toxic dose and
the effective dose of a drug. A narrow index means that the difference between a
therapeutic dose and a toxic dose is very small. Consequently, patients must be
monitored closely with lab tests to ensure levels stay within a safe range.
5. Which phase of drug metabolism involves conjugation reactions that make drugs
more water-soluble for excretion?
A. Phase II
B. Phase I
C. Phase III
D. Phase IV
Correct Answer: A
, Expert Explanation: Phase II metabolism involves conjugation, where a functional
group like glucuronic acid is attached to the drug. This process significantly
increases the water solubility of the molecule, facilitating its excretion through the
bile or urine. Phase I typically involves oxidation, reduction, or hydrolysis via the
CYP450 system.
6. Which pharmacokinetic change is commonly seen in geriatric patients?
A. Increased total body water
B. Increased lean muscle mass
C. Increased hepatic blood flow
D. Increased percentage of body fat
Correct Answer: D
Expert Explanation: As patients age, their body composition changes, typically
showing an increase in adipose tissue (fat) and a decrease in total body water and
lean mass. These changes affect the distribution of lipophilic drugs, which may have
a prolonged half-life in older adults. Understanding these physiological shifts is
crucial for safe prescribing in geriatrics.
7. What is the primary site of drug excretion in the human body?
A. Lungs
B. Kidneys
