LEHNE PHARM ANTIPSYCHOTIC DRUGS & SCHIZOPHRENIA PRACTICE QUESTION AND ANSWERS EXAM WITH 100% CORRECT ANSWERS WITH RATIONALE | A+ GRADED UPDATE.

LEHNE PHARM ANTIPSYCHOTIC DRUGS &
SCHIZOPHRENIA PRACTICE QUESTION AND
ANSWERS EXAM WITH 100% CORRECT ANSWERS
WITH RATIONALE | A+ GRADED 2026-2027 UPDATE.

1. The dopamine hypothesis of schizophrenia mainly implicates dysfunction in which
pathway?
A. Nigrostriatal pathway
B. Mesolimbic pathway
C. Tuberoinfundibular pathway
D. Mesocortical pathway
Answer: B. Mesolimbic pathway
Rationale: Positive symptoms of schizophrenia are linked to increased dopamine activity
in the mesolimbic pathway.

2. Which neurotransmitter is most strongly associated with positive symptoms of
schizophrenia?
A. Serotonin
B. GABA
C. Dopamine
D. Acetylcholine
Answer: C. Dopamine
Rationale: Dopamine excess in mesolimbic regions produces hallucinations and
delusions.

3. Which of the following is a first-generation (typical) antipsychotic?
A. Clozapine
B. Risperidone
C. Haloperidol
D. Olanzapine
Answer: C. Haloperidol
Rationale: Haloperidol is a high-potency typical antipsychotic.

4. Which drug is classified as a low-potency typical antipsychotic?
A. Fluphenazine
B. Chlorpromazine
C. Haloperidol

, D. Aripiprazole
Answer: B. Chlorpromazine
Rationale: Low-potency FGAs include chlorpromazine and thioridazine.

5. Which antipsychotic is associated with agranulocytosis risk?
A. Risperidone
B. Clozapine
C. Haloperidol
D. Chlorpromazine
Answer: B. Clozapine
Rationale: Clozapine requires regular blood monitoring due to agranulocytosis risk.

6. Clozapine is most effective for which symptom cluster?
A. Positive symptoms only
B. Negative symptoms and treatment-resistant schizophrenia
C. Extrapyramidal symptoms
D. Acute agitation only
Answer: B. Negative symptoms and treatment-resistant schizophrenia
Rationale: Clozapine improves negative symptoms and is used in refractory cases.

7. Which receptor blockade is primarily responsible for antipsychotic effects?
A. GABA-A
B. D2 dopamine receptor
C. NMDA receptor
D. Beta-adrenergic receptor
Answer: B. D2 dopamine receptor
Rationale: D2 blockade reduces psychotic symptoms.

8. Extrapyramidal side effects are most strongly associated with:
A. High D2 blockade
B. Muscarinic blockade
C. Serotonin agonism
D. Histamine blockade
Answer: A. High D2 blockade
Rationale: Strong dopamine blockade in nigrostriatal pathway causes EPS.

9. Which condition is caused by antipsychotic-induced dopamine blockade in the
tuberoinfundibular pathway?
A. Akathisia
B. Hyperprolactinemia

, C. Tardive dyskinesia
D. Neuroleptic malignant syndrome
Answer: B. Hyperprolactinemia
Rationale: Dopamine normally inhibits prolactin secretion.

10. A patient develops muscular rigidity, fever, and autonomic instability after antipsychotic
use. Diagnosis?
A. Serotonin syndrome
B. Neuroleptic malignant syndrome
C. Acute dystonia
D. Akathisia
Answer: B. Neuroleptic malignant syndrome
Rationale: NMS is a life-threatening reaction to dopamine blockade.

11. Which drug is an atypical antipsychotic?
A. Thiothixene
B. Fluphenazine
C. Risperidone
D. Haloperidol
Answer: C. Risperidone
Rationale: Risperidone is a second-generation antipsychotic.

12. Atypical antipsychotics primarily block which receptors in addition to D2?
A. H1 only
B. 5-HT2A
C. GABA-A
D. NMDA
Answer: B. 5-HT2A
Rationale: 5-HT2A blockade reduces EPS risk.

13. Which antipsychotic has partial dopamine agonist activity?
A. Aripiprazole
B. Clozapine
C. Chlorpromazine
D. Haloperidol
Answer: A. Aripiprazole
Rationale: Aripiprazole is a D2 partial agonist.

14. Which side effect is most associated with olanzapine?
A. Weight loss