NSG552 PSYCHOPHARMACOLOGY EXAM 1 REVIEW
PRACTICE QUESTIONS WITH VERIFIED ANSWERS &
DETAILED RATIONALES |KEY TERMS, SIDE EFFECTS, & TREATMENT
GUIDELINES LATEST UPDATE
SECTION 1: BASIC PRINCIPLES OF PSYCHOPHARMACOLOGY (Qs 1-30)
Q1. What is the primary mechanism of action of most psychotropic medications?
A) Directly altering neurotransmitter levels in the synaptic cleft
B) Modulating receptor activity or neurotransmitter reuptake/degradation
C) Destroying excess neurotransmitters
D) Creating new neural pathways
Answer: B
Rationale: Most psychotropic medications work by modulating receptor activity
or altering neurotransmitter reuptake, degradation, or synthesis. This changes the
availability of neurotransmitters at the synapse, which affects neuronal signaling
and ultimately alters mood, thought, and behavior.
Why Wrong:
- A: While some drugs directly alter levels, the broader mechanism is modulation
of receptor activity and neurotransmitter dynamics.
- C: Medications do not destroy neurotransmitters; they affect their reuptake or
breakdown.
- D: Psychotropics do not create new neural pathways; they modify existing
neurotransmission.
Q2. The "blood-brain barrier" (BBB) is important in psychopharmacology because:
A) It prevents all medications from entering the brain
B) It selectively allows lipid-soluble drugs to cross into the CNS
C) It blocks all neurotransmitters from leaving the brain
D) It is the site of medication metabolism
Answer: B
1
,Rationale: The BBB is a semipermeable barrier that allows lipid-soluble molecules
to cross via passive diffusion. Most psychotropic drugs are lipophilic (lipid-soluble)
to facilitate CNS penetration. This is why psychotropics are often highly protein-
bound and lipid-soluble.
Why Wrong:
- A: The BBB does not prevent all medications from entering; it selectively allows
lipid-soluble drugs to cross.
- C: The BBB does not block neurotransmitters from leaving the brain; it regulates
passage of substances.
- D: Medication metabolism occurs primarily in the liver, not the BBB.
Q3. Which of the following is the most common route of administration for
psychotropic medications?
A) Intramuscular
B) Intravenous
C) Oral
D) Sublingual
Answer: C
Rationale: Oral administration is the most common route because it is
convenient, cost-effective, and generally well-tolerated. It allows for flexible
dosing and is preferred for outpatient and long-term treatment.
Why Wrong:
- A: IM is used for emergency or long-acting formulations but is not the most
common route.
- B: IV is used in acute settings but is not the primary route for outpatient
psychotropics.
- D: Sublingual is used for certain medications (e.g., buprenorphine, asenapine)
but is not the most common route.
2
,Q4. What does the term "pharmacodynamics" refer to in psychopharmacology?
A) What the body does to the drug (absorption, distribution, metabolism,
excretion)
B) What the drug does to the body (mechanism of action, receptor binding)
C) The study of drug interactions
D) The study of drug side effects
Answer: B
Rationale: Pharmacodynamics is the study of the biochemical and physiological
effects of drugs and their mechanisms of action. It describes what the drug does
to the body, including receptor binding, signal transduction, and downstream
effects.
Why Wrong:
- A: Pharmacokinetics refers to what the body does to the drug.
- C: Drug interactions are a component of both pharmacodynamics and
pharmacokinetics.
- D: Side effects are a result of pharmacodynamic actions but are not the
definition.
Q5. Which organ is primarily responsible for drug metabolism in
psychopharmacology?
A) Kidneys
B) Liver
C) Lungs
D) Brain
Answer: B
Rationale: The liver is the primary site of drug metabolism. It contains cytochrome
P450 enzymes that break down psychotropic medications into active or inactive
metabolites. Hepatic metabolism is a key determinant of drug efficacy and side
effect profile.
3
, Why Wrong:
- A: The kidneys are primarily responsible for drug excretion, not metabolism.
- C: The lungs play a minor role in drug metabolism.
- D: The brain is the site of drug action, not metabolism.
Q6. Which CYP450 enzyme is responsible for metabolizing the majority of
psychotropic medications?
A) CYP1A2
B) CYP2D6
C) CYP3A4
D) CYP2C19
Answer: C
Rationale: CYP3A4 is the most abundant CYP450 enzyme in the liver and
metabolizes approximately 50% of all medications, including many psychotropics.
It is involved in the metabolism of benzodiazepines, antipsychotics, and
antidepressants.
Why Wrong:
- A: CYP1A2 metabolizes caffeine and some antipsychotics.
- B: CYP2D6 metabolizes many antidepressants and antipsychotics.
- D: CYP2C19 metabolizes antidepressants and proton pump inhibitors.
Q7. A patient with a CYP2D6 poor metabolizer phenotype is prescribed fluoxetine.
What is the most likely outcome?
A) Decreased drug efficacy
B) Increased risk of side effects due to higher drug levels
C) No change in drug levels
D) Faster drug clearance
Answer: B
4
PRACTICE QUESTIONS WITH VERIFIED ANSWERS &
DETAILED RATIONALES |KEY TERMS, SIDE EFFECTS, & TREATMENT
GUIDELINES LATEST UPDATE
SECTION 1: BASIC PRINCIPLES OF PSYCHOPHARMACOLOGY (Qs 1-30)
Q1. What is the primary mechanism of action of most psychotropic medications?
A) Directly altering neurotransmitter levels in the synaptic cleft
B) Modulating receptor activity or neurotransmitter reuptake/degradation
C) Destroying excess neurotransmitters
D) Creating new neural pathways
Answer: B
Rationale: Most psychotropic medications work by modulating receptor activity
or altering neurotransmitter reuptake, degradation, or synthesis. This changes the
availability of neurotransmitters at the synapse, which affects neuronal signaling
and ultimately alters mood, thought, and behavior.
Why Wrong:
- A: While some drugs directly alter levels, the broader mechanism is modulation
of receptor activity and neurotransmitter dynamics.
- C: Medications do not destroy neurotransmitters; they affect their reuptake or
breakdown.
- D: Psychotropics do not create new neural pathways; they modify existing
neurotransmission.
Q2. The "blood-brain barrier" (BBB) is important in psychopharmacology because:
A) It prevents all medications from entering the brain
B) It selectively allows lipid-soluble drugs to cross into the CNS
C) It blocks all neurotransmitters from leaving the brain
D) It is the site of medication metabolism
Answer: B
1
,Rationale: The BBB is a semipermeable barrier that allows lipid-soluble molecules
to cross via passive diffusion. Most psychotropic drugs are lipophilic (lipid-soluble)
to facilitate CNS penetration. This is why psychotropics are often highly protein-
bound and lipid-soluble.
Why Wrong:
- A: The BBB does not prevent all medications from entering; it selectively allows
lipid-soluble drugs to cross.
- C: The BBB does not block neurotransmitters from leaving the brain; it regulates
passage of substances.
- D: Medication metabolism occurs primarily in the liver, not the BBB.
Q3. Which of the following is the most common route of administration for
psychotropic medications?
A) Intramuscular
B) Intravenous
C) Oral
D) Sublingual
Answer: C
Rationale: Oral administration is the most common route because it is
convenient, cost-effective, and generally well-tolerated. It allows for flexible
dosing and is preferred for outpatient and long-term treatment.
Why Wrong:
- A: IM is used for emergency or long-acting formulations but is not the most
common route.
- B: IV is used in acute settings but is not the primary route for outpatient
psychotropics.
- D: Sublingual is used for certain medications (e.g., buprenorphine, asenapine)
but is not the most common route.
2
,Q4. What does the term "pharmacodynamics" refer to in psychopharmacology?
A) What the body does to the drug (absorption, distribution, metabolism,
excretion)
B) What the drug does to the body (mechanism of action, receptor binding)
C) The study of drug interactions
D) The study of drug side effects
Answer: B
Rationale: Pharmacodynamics is the study of the biochemical and physiological
effects of drugs and their mechanisms of action. It describes what the drug does
to the body, including receptor binding, signal transduction, and downstream
effects.
Why Wrong:
- A: Pharmacokinetics refers to what the body does to the drug.
- C: Drug interactions are a component of both pharmacodynamics and
pharmacokinetics.
- D: Side effects are a result of pharmacodynamic actions but are not the
definition.
Q5. Which organ is primarily responsible for drug metabolism in
psychopharmacology?
A) Kidneys
B) Liver
C) Lungs
D) Brain
Answer: B
Rationale: The liver is the primary site of drug metabolism. It contains cytochrome
P450 enzymes that break down psychotropic medications into active or inactive
metabolites. Hepatic metabolism is a key determinant of drug efficacy and side
effect profile.
3
, Why Wrong:
- A: The kidneys are primarily responsible for drug excretion, not metabolism.
- C: The lungs play a minor role in drug metabolism.
- D: The brain is the site of drug action, not metabolism.
Q6. Which CYP450 enzyme is responsible for metabolizing the majority of
psychotropic medications?
A) CYP1A2
B) CYP2D6
C) CYP3A4
D) CYP2C19
Answer: C
Rationale: CYP3A4 is the most abundant CYP450 enzyme in the liver and
metabolizes approximately 50% of all medications, including many psychotropics.
It is involved in the metabolism of benzodiazepines, antipsychotics, and
antidepressants.
Why Wrong:
- A: CYP1A2 metabolizes caffeine and some antipsychotics.
- B: CYP2D6 metabolizes many antidepressants and antipsychotics.
- D: CYP2C19 metabolizes antidepressants and proton pump inhibitors.
Q7. A patient with a CYP2D6 poor metabolizer phenotype is prescribed fluoxetine.
What is the most likely outcome?
A) Decreased drug efficacy
B) Increased risk of side effects due to higher drug levels
C) No change in drug levels
D) Faster drug clearance
Answer: B
4
