NR565 EXAM 1 ADVANCED
PHARMACOLOGY FUNDAMENTALS
(VERIFIED AND CORRECT Q & A)
SATISFACTION GUARANTEED 2026/2027
CHAMBERLAIN
1. A patient is prescribed a drug with a high first-pass effect. Which route of administration
would result in the lowest bioavailability?
A. Intravenous
B. Oral
C. Sublingual
D. Intramuscular
Answer: B
Conceptual Explanation: Drugs administered orally travel through the portal vein to the
liver, where they are metabolized before reaching systemic circulation, characteristic of the
first-pass effect.
2. Which cytochrome P450 enzyme is responsible for the metabolism of approximately 50%
of all clinically used drugs?
A. CYP2D6
,B. CYP1A2
C. CYP3A4
D. CYP2C19
Answer: C
Conceptual Explanation: CYP3A4 is the most abundant and significant enzyme in the
cytochrome P450 system, metabolizing about half of all medications.
3. A drug has a half-life of 4 hours. How many hours will it take for the drug to reach
approximately 94% steady-state concentration?
A. 8 hours
B. 12 hours
C. 20 hours
D. 16 hours
Answer: D
Conceptual Explanation: It takes approximately 4 to 5 half-lives to reach steady state. 4
hours times 4 half-lives equals 16 hours.
4. Which schedule of controlled substances has the highest potential for abuse while still
maintaining an accepted medical use?
A. Schedule II
B. Schedule I
, C. Schedule III
D. Schedule IV
Answer: A
Conceptual Explanation: Schedule II drugs have a high potential for abuse but are
accepted for medical use. Schedule I drugs have no accepted medical use.
5. When prescribing for a geriatric patient, the clinician should be aware that which
physiological change increases the risk of drug toxicity?
A. Increased total body water
B. Increased glomerular filtration rate
C. Decreased serum albumin levels
D. Decreased body fat percentage
Answer: C
Conceptual Explanation: Decreased albumin levels result in fewer binding sites for
protein-bound drugs, leading to higher free drug levels and potential toxicity.
6. An agonist drug is defined as one that:
A. Blocks a receptor to prevent activation.
B. Permanently inactivates a receptor site.
C. Decreases the affinity of other drugs for a receptor.
PHARMACOLOGY FUNDAMENTALS
(VERIFIED AND CORRECT Q & A)
SATISFACTION GUARANTEED 2026/2027
CHAMBERLAIN
1. A patient is prescribed a drug with a high first-pass effect. Which route of administration
would result in the lowest bioavailability?
A. Intravenous
B. Oral
C. Sublingual
D. Intramuscular
Answer: B
Conceptual Explanation: Drugs administered orally travel through the portal vein to the
liver, where they are metabolized before reaching systemic circulation, characteristic of the
first-pass effect.
2. Which cytochrome P450 enzyme is responsible for the metabolism of approximately 50%
of all clinically used drugs?
A. CYP2D6
,B. CYP1A2
C. CYP3A4
D. CYP2C19
Answer: C
Conceptual Explanation: CYP3A4 is the most abundant and significant enzyme in the
cytochrome P450 system, metabolizing about half of all medications.
3. A drug has a half-life of 4 hours. How many hours will it take for the drug to reach
approximately 94% steady-state concentration?
A. 8 hours
B. 12 hours
C. 20 hours
D. 16 hours
Answer: D
Conceptual Explanation: It takes approximately 4 to 5 half-lives to reach steady state. 4
hours times 4 half-lives equals 16 hours.
4. Which schedule of controlled substances has the highest potential for abuse while still
maintaining an accepted medical use?
A. Schedule II
B. Schedule I
, C. Schedule III
D. Schedule IV
Answer: A
Conceptual Explanation: Schedule II drugs have a high potential for abuse but are
accepted for medical use. Schedule I drugs have no accepted medical use.
5. When prescribing for a geriatric patient, the clinician should be aware that which
physiological change increases the risk of drug toxicity?
A. Increased total body water
B. Increased glomerular filtration rate
C. Decreased serum albumin levels
D. Decreased body fat percentage
Answer: C
Conceptual Explanation: Decreased albumin levels result in fewer binding sites for
protein-bound drugs, leading to higher free drug levels and potential toxicity.
6. An agonist drug is defined as one that:
A. Blocks a receptor to prevent activation.
B. Permanently inactivates a receptor site.
C. Decreases the affinity of other drugs for a receptor.
