1
GEORGETTE'S LMR PMHNP CERTIFICATION EXAM NEWEST 2025/ 2026
PACKAGE DEAL| 2 VERSIONS (EXAM 1 & 2)WITH COMPLETE 1,350
ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A | GEORGETTE'S LMR PMHNP
CERTIFICATION EXAM PREP (BRAND NE
QUESTIONS 1–20: Scientific Foundation (Neurobiology, Psychopharmacology, Research)
1. A patient with schizophrenia has been stable on risperidone 4 mg daily for two years. They develop
galactorrhea and sexual dysfunction. These side effects are primarily mediated by:
A. Histamine H1 receptor blockade
B. Dopamine D2 receptor blockade in the tuberoinfundibular pathway
C. Serotonin 5-HT2A receptor blockade
D. Alpha-1 adrenergic receptor blockade
Answer: B
D2 blockade in the tuberoinfundibular pathway disinhibits prolactin secretion, causing
hyperprolactinemia with galactorrhea, amenorrhea, and sexual dysfunction. Risperidone and
paliperidone have the highest prolactin elevation among atypicals. Switching to aripiprazole (partial D2
agonist) or another low-prolactin agent is appropriate.
2. A 45-year-old patient with bipolar I disorder on lithium develops polyuria, polydipsia, and dilute
urine (specific gravity 1.003). Lithium level is 0.8 mEq/L. What is the most likely cause?
A. Diabetes mellitus
B. Nephrogenic diabetes insipidus
C. Central diabetes insipidus
D. Psychogenic polydipsia
Answer: B
Lithium reduces renal responsiveness to antidiuretic hormone (ADH), causing nephrogenic diabetes
insipidus. Urine is dilute (low specific gravity) despite normal or elevated ADH levels. Management
includes amiloride, hydrochlorothiazide (paradoxical effect), or switching to an alternative mood
stabilizer. Lithium level is therapeutic, ruling out acute toxicity.
3. Which cytochrome P450 enzyme is primarily responsible for clozapine metabolism?
A. CYP2D6
B. CYP1A2
C. CYP3A4
D. CYP2C19
pg. 1
,2
Answer: B
Clozapine is primarily metabolized by CYP1A2. Smoking induces CYP1A2, lowering clozapine levels.
Fluvoxamine (potent CYP1A2 inhibitor) can dramatically increase clozapine levels. CYP2D6 and CYP3A4
also contribute but are not the primary pathway.
4. A patient on an MAOI (phenelzine) should avoid which food to prevent hypertensive crisis?
A. Fresh vegetables
B. Aged cheese
C. White rice
D. Poultry
Answer: B
MAOIs inhibit tyramine breakdown. Aged cheeses, cured meats, tap beer, sauerkraut, and fermented
foods contain high tyramine. When MAO-A is inhibited, tyramine is not degraded, causing massive
norepinephrine release and hypertensive crisis. Treatment: phentolamine IV.
5. Which medication is FDA-approved specifically for treatment-resistant depression as an adjunct to
oral antidepressants?
A. Intravenous ketamine
B. Intranasal esketamine
C. Psilocybin
D. MDMA
Answer: B
Intranasal esketamine (Spravato) is FDA-approved for treatment-resistant depression in conjunction
with an oral antidepressant. It is administered under direct supervision in a certified healthcare setting
due to risks of sedation, dissociation, and abuse. IV ketamine is used off-label.
6. A patient develops hyperthermia (104°F), muscle rigidity, tachycardia, altered mental status, and CK
of 12,000 U/L after starting haloperidol. What is the antidote?
A. Cyproheptadine
B. Dantrolene
C. Naloxone
D. Flumazenil
Answer: B
Neuroleptic malignant syndrome (NMS) is a life-threatening reaction to D2 antagonists. Dantrolene
(muscle relaxant inhibiting calcium release from sarcoplasmic reticulum) and bromocriptine (dopamine
agonist) are treatments. Cyproheptadine treats serotonin syndrome. Naloxone reverses opioids.
Flumazenil reverses benzodiazepines.
pg. 2
,3
7. A depressed patient has low CSF 5-HIAA. This metabolite is derived from:
A. Dopamine
B. Serotonin
C. Norepinephrine
D. Acetylcholine
Answer: B
5-HIAA (5-hydroxyindoleacetic acid) is the primary metabolite of serotonin. Low CSF 5-HIAA is associated
with impulsivity, aggression, and suicide. HVA is the dopamine metabolite. MHPG is the norepinephrine
metabolite.
8. The BDNF Val66Met polymorphism (Met allele) is most consistently linked to:
A. Bipolar I disorder
B. Treatment-resistant depression
C. Generalized anxiety disorder
D. Attention-deficit/hyperactivity disorder
Answer: B
The BDNF Val66Met polymorphism reduces activity-dependent BDNF secretion and neuroplasticity. The
Met allele has been consistently associated with reduced hippocampal volume, impaired memory, and
poorer antidepressant response, contributing to treatment-resistant depression.
9. A patient on valproic acid develops sudden abdominal pain, nausea, vomiting, and elevated
amylase/lipase. What is the most likely cause?
A. Gastroenteritis
B. Valproic acid-induced pancreatitis
C. Lithium toxicity
D. Olanzapine-associated cholecystitis
Answer: B
Valproic acid carries an FDA black box warning for life-threatening pancreatitis, which can occur at any
time during treatment and is not dose-dependent. Immediate discontinuation and medical evaluation
are required. Liver failure is another black box warning for valproate.
10. A patient with PTSD has reduced hippocampal volume on MRI. This finding is most likely due to:
A. Genetic predisposition only
B. Chronic glucocorticoid neurotoxicity from HPA axis dysregulation
C. Antipsychotic medication side effects
D. Normal aging process
Answer: B
PTSD is associated with HPA axis dysregulation and elevated cortisol, which is neurotoxic to
pg. 3
, 4
hippocampal neurons. This results in reduced hippocampal volume and associated memory deficits. The
amygdala is hyperactive, and prefrontal cortex is hypoactive in PTSD.
11. Carbamazepine's auto-induction property means that:
A. It inhibits its own metabolism over time
B. It induces its own metabolism, often requiring dose increases after several weeks
C. It has no effect on its own metabolism
D. It accumulates to toxic levels over time
Answer: B
Carbamazepine induces CYP3A4 and other enzymes, including those that metabolize itself. After several
weeks, serum levels may drop as auto-induction progresses, requiring dose adjustment. It also induces
metabolism of oral contraceptives, many antipsychotics, and other medications.
12. Which neurotransmitter system is the primary target of varenicline?
A. Dopamine D2 receptors
B. Nicotinic acetylcholine receptors (partial agonist at α4β2)
C. Serotonin 5-HT3 receptors
D. GABA-A receptors
Answer: B
Varenicline is a partial agonist at α4β2 nicotinic acetylcholine receptors. It partially stimulates these
receptors to reduce cravings and withdrawal, while blocking nicotine from binding, reducing the
rewarding effects of smoking. It is the most effective pharmacotherapy for smoking cessation.
13. The therapeutic serum level range for lithium in acute mania is:
A. 0.2–0.4 mEq/L
B. 0.6–0.8 mEq/L
C. 0.8–1.2 mEq/L
D. 1.5–2.0 mEq/L
Answer: C
For acute mania, lithium levels of 0.8–1.2 mEq/L are targeted. Maintenance levels are typically 0.6–0.8
mEq/L. Levels above 1.5 mEq/L are considered toxic. Lithium has a narrow therapeutic index requiring
regular monitoring (every 3–6 months when stable).
14. A patient is prescribed clozapine. The mandatory ANC monitoring schedule is:
A. Monthly for the first year
B. Weekly for 6 months, then every 2 weeks for 6 months, then monthly
C. Only at baseline and then annually
D. Every 3 months indefinitely
pg. 4
GEORGETTE'S LMR PMHNP CERTIFICATION EXAM NEWEST 2025/ 2026
PACKAGE DEAL| 2 VERSIONS (EXAM 1 & 2)WITH COMPLETE 1,350
ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS
(VERIFIED ANSWERS) GRADED A | GEORGETTE'S LMR PMHNP
CERTIFICATION EXAM PREP (BRAND NE
QUESTIONS 1–20: Scientific Foundation (Neurobiology, Psychopharmacology, Research)
1. A patient with schizophrenia has been stable on risperidone 4 mg daily for two years. They develop
galactorrhea and sexual dysfunction. These side effects are primarily mediated by:
A. Histamine H1 receptor blockade
B. Dopamine D2 receptor blockade in the tuberoinfundibular pathway
C. Serotonin 5-HT2A receptor blockade
D. Alpha-1 adrenergic receptor blockade
Answer: B
D2 blockade in the tuberoinfundibular pathway disinhibits prolactin secretion, causing
hyperprolactinemia with galactorrhea, amenorrhea, and sexual dysfunction. Risperidone and
paliperidone have the highest prolactin elevation among atypicals. Switching to aripiprazole (partial D2
agonist) or another low-prolactin agent is appropriate.
2. A 45-year-old patient with bipolar I disorder on lithium develops polyuria, polydipsia, and dilute
urine (specific gravity 1.003). Lithium level is 0.8 mEq/L. What is the most likely cause?
A. Diabetes mellitus
B. Nephrogenic diabetes insipidus
C. Central diabetes insipidus
D. Psychogenic polydipsia
Answer: B
Lithium reduces renal responsiveness to antidiuretic hormone (ADH), causing nephrogenic diabetes
insipidus. Urine is dilute (low specific gravity) despite normal or elevated ADH levels. Management
includes amiloride, hydrochlorothiazide (paradoxical effect), or switching to an alternative mood
stabilizer. Lithium level is therapeutic, ruling out acute toxicity.
3. Which cytochrome P450 enzyme is primarily responsible for clozapine metabolism?
A. CYP2D6
B. CYP1A2
C. CYP3A4
D. CYP2C19
pg. 1
,2
Answer: B
Clozapine is primarily metabolized by CYP1A2. Smoking induces CYP1A2, lowering clozapine levels.
Fluvoxamine (potent CYP1A2 inhibitor) can dramatically increase clozapine levels. CYP2D6 and CYP3A4
also contribute but are not the primary pathway.
4. A patient on an MAOI (phenelzine) should avoid which food to prevent hypertensive crisis?
A. Fresh vegetables
B. Aged cheese
C. White rice
D. Poultry
Answer: B
MAOIs inhibit tyramine breakdown. Aged cheeses, cured meats, tap beer, sauerkraut, and fermented
foods contain high tyramine. When MAO-A is inhibited, tyramine is not degraded, causing massive
norepinephrine release and hypertensive crisis. Treatment: phentolamine IV.
5. Which medication is FDA-approved specifically for treatment-resistant depression as an adjunct to
oral antidepressants?
A. Intravenous ketamine
B. Intranasal esketamine
C. Psilocybin
D. MDMA
Answer: B
Intranasal esketamine (Spravato) is FDA-approved for treatment-resistant depression in conjunction
with an oral antidepressant. It is administered under direct supervision in a certified healthcare setting
due to risks of sedation, dissociation, and abuse. IV ketamine is used off-label.
6. A patient develops hyperthermia (104°F), muscle rigidity, tachycardia, altered mental status, and CK
of 12,000 U/L after starting haloperidol. What is the antidote?
A. Cyproheptadine
B. Dantrolene
C. Naloxone
D. Flumazenil
Answer: B
Neuroleptic malignant syndrome (NMS) is a life-threatening reaction to D2 antagonists. Dantrolene
(muscle relaxant inhibiting calcium release from sarcoplasmic reticulum) and bromocriptine (dopamine
agonist) are treatments. Cyproheptadine treats serotonin syndrome. Naloxone reverses opioids.
Flumazenil reverses benzodiazepines.
pg. 2
,3
7. A depressed patient has low CSF 5-HIAA. This metabolite is derived from:
A. Dopamine
B. Serotonin
C. Norepinephrine
D. Acetylcholine
Answer: B
5-HIAA (5-hydroxyindoleacetic acid) is the primary metabolite of serotonin. Low CSF 5-HIAA is associated
with impulsivity, aggression, and suicide. HVA is the dopamine metabolite. MHPG is the norepinephrine
metabolite.
8. The BDNF Val66Met polymorphism (Met allele) is most consistently linked to:
A. Bipolar I disorder
B. Treatment-resistant depression
C. Generalized anxiety disorder
D. Attention-deficit/hyperactivity disorder
Answer: B
The BDNF Val66Met polymorphism reduces activity-dependent BDNF secretion and neuroplasticity. The
Met allele has been consistently associated with reduced hippocampal volume, impaired memory, and
poorer antidepressant response, contributing to treatment-resistant depression.
9. A patient on valproic acid develops sudden abdominal pain, nausea, vomiting, and elevated
amylase/lipase. What is the most likely cause?
A. Gastroenteritis
B. Valproic acid-induced pancreatitis
C. Lithium toxicity
D. Olanzapine-associated cholecystitis
Answer: B
Valproic acid carries an FDA black box warning for life-threatening pancreatitis, which can occur at any
time during treatment and is not dose-dependent. Immediate discontinuation and medical evaluation
are required. Liver failure is another black box warning for valproate.
10. A patient with PTSD has reduced hippocampal volume on MRI. This finding is most likely due to:
A. Genetic predisposition only
B. Chronic glucocorticoid neurotoxicity from HPA axis dysregulation
C. Antipsychotic medication side effects
D. Normal aging process
Answer: B
PTSD is associated with HPA axis dysregulation and elevated cortisol, which is neurotoxic to
pg. 3
, 4
hippocampal neurons. This results in reduced hippocampal volume and associated memory deficits. The
amygdala is hyperactive, and prefrontal cortex is hypoactive in PTSD.
11. Carbamazepine's auto-induction property means that:
A. It inhibits its own metabolism over time
B. It induces its own metabolism, often requiring dose increases after several weeks
C. It has no effect on its own metabolism
D. It accumulates to toxic levels over time
Answer: B
Carbamazepine induces CYP3A4 and other enzymes, including those that metabolize itself. After several
weeks, serum levels may drop as auto-induction progresses, requiring dose adjustment. It also induces
metabolism of oral contraceptives, many antipsychotics, and other medications.
12. Which neurotransmitter system is the primary target of varenicline?
A. Dopamine D2 receptors
B. Nicotinic acetylcholine receptors (partial agonist at α4β2)
C. Serotonin 5-HT3 receptors
D. GABA-A receptors
Answer: B
Varenicline is a partial agonist at α4β2 nicotinic acetylcholine receptors. It partially stimulates these
receptors to reduce cravings and withdrawal, while blocking nicotine from binding, reducing the
rewarding effects of smoking. It is the most effective pharmacotherapy for smoking cessation.
13. The therapeutic serum level range for lithium in acute mania is:
A. 0.2–0.4 mEq/L
B. 0.6–0.8 mEq/L
C. 0.8–1.2 mEq/L
D. 1.5–2.0 mEq/L
Answer: C
For acute mania, lithium levels of 0.8–1.2 mEq/L are targeted. Maintenance levels are typically 0.6–0.8
mEq/L. Levels above 1.5 mEq/L are considered toxic. Lithium has a narrow therapeutic index requiring
regular monitoring (every 3–6 months when stable).
14. A patient is prescribed clozapine. The mandatory ANC monitoring schedule is:
A. Monthly for the first year
B. Weekly for 6 months, then every 2 weeks for 6 months, then monthly
C. Only at baseline and then annually
D. Every 3 months indefinitely
pg. 4
