NR566 | NR566 Advanced Pharmacology for Care
of the Family Wk 3 Midterm v1 | Questions with
Correct Answers and Expert Explanation for Each
Question | Chamberlain
1. When prescribing a medication, the clinician understands that the ‘first-pass effect’
primarily occurs with which route of administration?
A. Intravenous
B. Sublingual
C. Oral
D. Intramuscular
Correct Answer: C
Expert Explanation: The first-pass effect refers to the rapid hepatic metabolism of
a drug after it is absorbed from the gastrointestinal tract and delivered to the liver
via the portal vein. When a drug is taken orally, it must pass through the liver before
reaching systemic circulation, which can significantly reduce its bioavailability.
Other routes like intravenous or sublingual bypass this initial hepatic metabolism,
allowing more of the drug to reach the target site immediately.
2. An elderly patient is being started on a new medication that is renally excreted.
Which lab value is most important for the provider to monitor to prevent toxicity?
A. Serum Albumin
,B. Hemoglobin A1c
C. Liver Enzymes
D. Creatinine Clearance
Correct Answer: D
Expert Explanation: Creatinine clearance is the most reliable indicator of renal
function in elderly patients, as serum creatinine alone can be misleading due to
decreased muscle mass. As kidney function declines with age, the rate of drug
excretion decreases, increasing the risk of accumulation and toxicity. Monitoring
this value allows the provider to adjust dosages appropriately to maintain safety
and efficacy.
3. A patient is prescribed a drug with a narrow therapeutic index. What does this term
imply regarding the drug’s safety?
A. The drug is very safe and requires no monitoring.
B. The drug has a very long half-life.
C. There is a small window between the effective dose and the toxic dose.
D. The drug is only effective at extremely high doses.
Correct Answer: C
,Expert Explanation: A narrow therapeutic index indicates that the difference
between the dose required for a therapeutic effect and the dose that causes toxicity
is very small. For these medications, even minor changes in blood levels can lead to
serious adverse effects or therapeutic failure. Consequently, patients on these drugs
often require frequent blood level monitoring to ensure they stay within the safe
range.
4. According to the Beers Criteria, which class of medications should generally be
avoided in the elderly due to the risk of falls and fractures?
A. Benzodiazepines
B. Beta-blockers
C. Proton Pump Inhibitors
D. ACE Inhibitors
Correct Answer: A
Expert Explanation: Benzodiazepines are listed in the Beers Criteria as potentially
inappropriate for elderly patients because they increase the risk of cognitive
impairment, delirium, falls, and fractures. Their long half-lives in older adults can
lead to prolonged sedation and ataxia. Providers are encouraged to seek non-
pharmacological interventions or safer drug alternatives for sleep or anxiety in this
population.
, 5. A patient is taking Warfarin (Coumadin) and is started on an antibiotic that inhibits
the CYP450 enzyme system. What is the most likely clinical outcome?
A. The INR will decrease, increasing the risk of clots.
B. The antibiotic will become less effective.
C. The INR will increase, increasing the risk of bleeding.
D. There will be no change in the patient’s coagulation profile.
Correct Answer: C
Expert Explanation: Inhibiting the CYP450 enzyme system slows down the
metabolism of drugs like Warfarin that are processed by those enzymes. Because
the drug stays in the system longer and at higher concentrations, the anticoagulant
effect is intensified, leading to an elevated International Normalized Ratio (INR).
This significantly increases the patient’s risk for spontaneous bleeding and requires
close monitoring and possible dose reduction.
6. Which of the following is a primary characteristic of a Schedule II controlled
substance?
A. High potential for abuse but has an accepted medical use.
B. Low potential for abuse and no medical use.
C. Moderate potential for abuse and available over-the-counter.
of the Family Wk 3 Midterm v1 | Questions with
Correct Answers and Expert Explanation for Each
Question | Chamberlain
1. When prescribing a medication, the clinician understands that the ‘first-pass effect’
primarily occurs with which route of administration?
A. Intravenous
B. Sublingual
C. Oral
D. Intramuscular
Correct Answer: C
Expert Explanation: The first-pass effect refers to the rapid hepatic metabolism of
a drug after it is absorbed from the gastrointestinal tract and delivered to the liver
via the portal vein. When a drug is taken orally, it must pass through the liver before
reaching systemic circulation, which can significantly reduce its bioavailability.
Other routes like intravenous or sublingual bypass this initial hepatic metabolism,
allowing more of the drug to reach the target site immediately.
2. An elderly patient is being started on a new medication that is renally excreted.
Which lab value is most important for the provider to monitor to prevent toxicity?
A. Serum Albumin
,B. Hemoglobin A1c
C. Liver Enzymes
D. Creatinine Clearance
Correct Answer: D
Expert Explanation: Creatinine clearance is the most reliable indicator of renal
function in elderly patients, as serum creatinine alone can be misleading due to
decreased muscle mass. As kidney function declines with age, the rate of drug
excretion decreases, increasing the risk of accumulation and toxicity. Monitoring
this value allows the provider to adjust dosages appropriately to maintain safety
and efficacy.
3. A patient is prescribed a drug with a narrow therapeutic index. What does this term
imply regarding the drug’s safety?
A. The drug is very safe and requires no monitoring.
B. The drug has a very long half-life.
C. There is a small window between the effective dose and the toxic dose.
D. The drug is only effective at extremely high doses.
Correct Answer: C
,Expert Explanation: A narrow therapeutic index indicates that the difference
between the dose required for a therapeutic effect and the dose that causes toxicity
is very small. For these medications, even minor changes in blood levels can lead to
serious adverse effects or therapeutic failure. Consequently, patients on these drugs
often require frequent blood level monitoring to ensure they stay within the safe
range.
4. According to the Beers Criteria, which class of medications should generally be
avoided in the elderly due to the risk of falls and fractures?
A. Benzodiazepines
B. Beta-blockers
C. Proton Pump Inhibitors
D. ACE Inhibitors
Correct Answer: A
Expert Explanation: Benzodiazepines are listed in the Beers Criteria as potentially
inappropriate for elderly patients because they increase the risk of cognitive
impairment, delirium, falls, and fractures. Their long half-lives in older adults can
lead to prolonged sedation and ataxia. Providers are encouraged to seek non-
pharmacological interventions or safer drug alternatives for sleep or anxiety in this
population.
, 5. A patient is taking Warfarin (Coumadin) and is started on an antibiotic that inhibits
the CYP450 enzyme system. What is the most likely clinical outcome?
A. The INR will decrease, increasing the risk of clots.
B. The antibiotic will become less effective.
C. The INR will increase, increasing the risk of bleeding.
D. There will be no change in the patient’s coagulation profile.
Correct Answer: C
Expert Explanation: Inhibiting the CYP450 enzyme system slows down the
metabolism of drugs like Warfarin that are processed by those enzymes. Because
the drug stays in the system longer and at higher concentrations, the anticoagulant
effect is intensified, leading to an elevated International Normalized Ratio (INR).
This significantly increases the patient’s risk for spontaneous bleeding and requires
close monitoring and possible dose reduction.
6. Which of the following is a primary characteristic of a Schedule II controlled
substance?
A. High potential for abuse but has an accepted medical use.
B. Low potential for abuse and no medical use.
C. Moderate potential for abuse and available over-the-counter.
