NR566 | NR566 Advanced Pharmacology for Care
of the Family Exam 1 Version 1 | Questions with
Correct Answers and Expert Explanation for Each
Question | Chamberlain
1. How many half-lives does it typically take for a drug to reach a steady-state
concentration in the plasma?
A. 1 to 2 half-lives
B. 4 to 5 half-lives
C. 8 to 10 half-lives
D. 12 to 15 half-lives
Correct Answer: B
Expert Explanation: Steady state is reached when the rate of drug administration
equals the rate of drug elimination. It generally takes approximately four to five
half-lives of a drug to achieve this equilibrium. This principle remains consistent
regardless of the dosage amount as long as the dosing interval is regular.
2. Which pharmacokinetic process is most significantly affected by the ‘First-Pass
Effect’ during oral administration?
A. Distribution
B. Absorption
,C. Metabolism
D. Excretion
Correct Answer: C
Expert Explanation: The first-pass effect refers to the rapid hepatic metabolism of
a drug absorbed from the gastrointestinal tract before it reaches systemic
circulation. This process occurs in the liver where enzymes may significantly reduce
the concentration of the active drug. Drugs with a high first-pass effect often require
higher oral doses compared to intravenous doses to achieve therapeutic effects.
3. An elderly patient is prescribed a new medication that is highly protein-bound. How
does age-related decline in serum albumin affect this drug’s activity?
A. It decreases the bioavailability of the drug.
B. It increases the concentration of free, active drug.
C. It causes the drug to be excreted faster.
D. It has no effect on the therapeutic outcome.
Correct Answer: B
Expert Explanation: Elderly patients often have lower levels of albumin, which is
the primary protein drugs bind to in the bloodstream. When albumin is low, there
are fewer binding sites available, leading to an increase in the free or unbound
,fraction of the drug. Since only the free drug is pharmacologically active, this can
increase the risk of toxicity and adverse reactions.
4. A patient with a history of asthma is diagnosed with hypertension. Which class of
antihypertensives should be used with extreme caution or avoided?
A. Non-selective Beta-blockers
B. ACE Inhibitors
C. Calcium Channel Blockers
D. Thiazide Diuretics
Correct Answer: A
Expert Explanation: Non-selective beta-blockers, such as propranolol, block both
beta-1 and beta-2 receptors. Blocking beta-2 receptors in the lungs can cause
bronchoconstriction, which is dangerous for patients with asthma or COPD.
Therefore, cardioselective beta-blockers are preferred if a beta-blocker must be
used, although caution is still advised.
5. Which of the following describes the mechanism of action of ACE inhibitors?
A. Inhibiting the release of renin from the kidneys
B. Directly blocking the Angiotensin II receptors
C. Blocking the conversion of Angiotensin I to Angiotensin II
, D. Increasing the production of aldosterone
Correct Answer: C
Expert Explanation: ACE inhibitors work by inhibiting the Angiotensin-Converting
Enzyme, which converts Angiotensin I to the potent vasoconstrictor Angiotensin II.
By reducing Angiotensin II levels, these drugs promote vasodilation and reduce
blood pressure. They also decrease the secretion of aldosterone, which helps reduce
sodium and water retention.
6. A common side effect of ACE inhibitors that often leads to discontinuation of the
therapy is:
A. Hypokalemia
B. A dry, non-productive cough
C. Peripheral edema
D. Tachycardia
Correct Answer: B
Expert Explanation: The dry cough associated with ACE inhibitors is caused by the
accumulation of bradykinin in the respiratory tract. Bradykinin is normally broken
down by the ACE enzyme, so inhibiting the enzyme leads to higher levels of this
inflammatory mediator. If a patient develops this cough, they are typically switched
to an Angiotensin Receptor Blocker (ARB).
of the Family Exam 1 Version 1 | Questions with
Correct Answers and Expert Explanation for Each
Question | Chamberlain
1. How many half-lives does it typically take for a drug to reach a steady-state
concentration in the plasma?
A. 1 to 2 half-lives
B. 4 to 5 half-lives
C. 8 to 10 half-lives
D. 12 to 15 half-lives
Correct Answer: B
Expert Explanation: Steady state is reached when the rate of drug administration
equals the rate of drug elimination. It generally takes approximately four to five
half-lives of a drug to achieve this equilibrium. This principle remains consistent
regardless of the dosage amount as long as the dosing interval is regular.
2. Which pharmacokinetic process is most significantly affected by the ‘First-Pass
Effect’ during oral administration?
A. Distribution
B. Absorption
,C. Metabolism
D. Excretion
Correct Answer: C
Expert Explanation: The first-pass effect refers to the rapid hepatic metabolism of
a drug absorbed from the gastrointestinal tract before it reaches systemic
circulation. This process occurs in the liver where enzymes may significantly reduce
the concentration of the active drug. Drugs with a high first-pass effect often require
higher oral doses compared to intravenous doses to achieve therapeutic effects.
3. An elderly patient is prescribed a new medication that is highly protein-bound. How
does age-related decline in serum albumin affect this drug’s activity?
A. It decreases the bioavailability of the drug.
B. It increases the concentration of free, active drug.
C. It causes the drug to be excreted faster.
D. It has no effect on the therapeutic outcome.
Correct Answer: B
Expert Explanation: Elderly patients often have lower levels of albumin, which is
the primary protein drugs bind to in the bloodstream. When albumin is low, there
are fewer binding sites available, leading to an increase in the free or unbound
,fraction of the drug. Since only the free drug is pharmacologically active, this can
increase the risk of toxicity and adverse reactions.
4. A patient with a history of asthma is diagnosed with hypertension. Which class of
antihypertensives should be used with extreme caution or avoided?
A. Non-selective Beta-blockers
B. ACE Inhibitors
C. Calcium Channel Blockers
D. Thiazide Diuretics
Correct Answer: A
Expert Explanation: Non-selective beta-blockers, such as propranolol, block both
beta-1 and beta-2 receptors. Blocking beta-2 receptors in the lungs can cause
bronchoconstriction, which is dangerous for patients with asthma or COPD.
Therefore, cardioselective beta-blockers are preferred if a beta-blocker must be
used, although caution is still advised.
5. Which of the following describes the mechanism of action of ACE inhibitors?
A. Inhibiting the release of renin from the kidneys
B. Directly blocking the Angiotensin II receptors
C. Blocking the conversion of Angiotensin I to Angiotensin II
, D. Increasing the production of aldosterone
Correct Answer: C
Expert Explanation: ACE inhibitors work by inhibiting the Angiotensin-Converting
Enzyme, which converts Angiotensin I to the potent vasoconstrictor Angiotensin II.
By reducing Angiotensin II levels, these drugs promote vasodilation and reduce
blood pressure. They also decrease the secretion of aldosterone, which helps reduce
sodium and water retention.
6. A common side effect of ACE inhibitors that often leads to discontinuation of the
therapy is:
A. Hypokalemia
B. A dry, non-productive cough
C. Peripheral edema
D. Tachycardia
Correct Answer: B
Expert Explanation: The dry cough associated with ACE inhibitors is caused by the
accumulation of bradykinin in the respiratory tract. Bradykinin is normally broken
down by the ACE enzyme, so inhibiting the enzyme leads to higher levels of this
inflammatory mediator. If a patient develops this cough, they are typically switched
to an Angiotensin Receptor Blocker (ARB).
