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AMC MCQ Psychiatry 2026: High-Yield Topics Every IMG Must Know

Last reviewed: May 2026 | Written by the MplusX Editorial Team

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– Psychiatry is 12.5% of the AMC MCQ — approximately 15 scored questions.

– It is the most under-prepared domain among IMGs from surgical or hospital medicine backgrounds.

– The highest-yield areas: depression, suicidality assessment, psychosis, the Mental Health Act, and substance use disorders.

– Australian-specific rules dominate — the Mental Health Act, mandatory duty of care obligations, and SSRI prescribing protocols are directly tested.

– Primary CTA: Try MplusX free — filter to Psychiatry and see what the question style looks like.

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Most IMGs treat Psychiatry like a side dish.

They spend weeks on General Medicine, Surgery, and OB/GYN. Psychiatry gets two days at the end of Month 2. Maybe a skim of one Murtagh chapter.

Then the exam arrives and Psychiatry costs them 8 to 10 marks they could not afford to lose.

This is predictable. It is also completely avoidable.

Psychiatry questions in the AMC MCQ are highly structured and consistent. The question types repeat. The clinical rules are learnable. The Australian-specific content — the Mental Health Act, the duty of care framework, the SSRI prescribing protocols — is all documented and drillable.

Two focused weeks on Psychiatry can take your accuracy in this domain from 40% to 65%. That is 4 to 5 additional marks. In an exam where every mark counts, that difference is significant.

Here is exactly what to study.

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High-Yield Topic 1: Depression

Depression is the most frequently tested psychiatric condition in the AMC MCQ. It appears across multiple question types — diagnosis, first-line management, safety assessment, and ongoing care.

Diagnostic Criteria (DSM-5 Framework)

The AMC uses DSM-5 diagnostic criteria. A major depressive episode requires:

Five or more of the following for at least 2 weeks, with at least one being depressed mood or loss of interest:

• Depressed mood most of the day, nearly every day

• Markedly diminished interest or pleasure (anhedonia)

• Significant weight change (gain or loss) or appetite disturbance

• Insomnia or hypersomnia

• Psychomotor agitation or retardation (observable by others)

• Fatigue or loss of energy

• Feelings of worthlessness or excessive guilt

• Difficulty concentrating or making decisions

• Recurrent thoughts of death or suicidal ideation

High-yield AMC trap: Grief following bereavement can look similar to depression. The key distinction is timeline and severity — normal grief involves preserved capacity for pleasure in some areas, no frank suicidal ideation, and typically improves over weeks. Depression requires intervention if the full diagnostic criteria are met beyond 2 weeks.

First-Line Management

For mild to moderate depression: Psychological therapy first — CBT (Cognitive Behavioural Therapy) is the preferred first-line approach in Australian guidelines. Pharmacotherapy is not mandatory for mild depression.

For moderate to severe depression: Combined approach — SSRI plus psychological therapy. First-line SSRI options: sertraline or escitalopram (best tolerability profile per Australian guidelines).

AMC trap: Do not choose tricyclic antidepressants (TCAs) as first-line. They are second or third-line due to side effect profile and toxicity in overdose. Similarly, MAOIs are not first-line choices.

Safety Assessment — The Non-Negotiable Step

Any question involving a depressed patient must include a safety assessment. The AMC tests whether you know:

1. Active suicidal ideation: Is there a plan? Is there intent? Is there access to means? 2. Protective factors: Social support, children at home, religious beliefs, reasons for living.

3. Risk stratification: Low/medium/high risk → outpatient management, enhanced community support, or involuntary admission.

If a depressed patient has active suicidal ideation with a plan and intent — the correct answer is psychiatric referral and likely admission, not “arrange outpatient follow-up in 2 weeks.”

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High-Yield Topic 2: Suicidality and Risk Assessment

Suicidality questions are amongst the most consistently appearing psychiatric scenarios in the AMC MCQ. They test clinical risk stratification and duty of care.

The Risk Stratification Framework

Risk Level	Features	Management
Low	Passive ideation, no plan, good support, agrees to safety plan	Outpatient management, safety planning, follow-up arranged
Medium	Active ideation, vague plan, moderate protective factors	Enhanced community support, crisis team involvement, consider voluntary admission
High	Active ideation, specific plan, intent, means available, poor supports	Psychiatric admission — voluntary or involuntary under Mental Health Act

AMC trap: The question will often include “reassure the patient and arrange review in 2 weeks” as a distractor when the clinical picture clearly indicates high risk. If the patient has a specific plan, intent, and access to means — this answer is wrong regardless of how calm the patient appears.

Duty of Care and Confidentiality

In Australia, if a patient expresses a credible, specific threat to harm themselves or a third party, the treating clinician’s duty of care overrides confidentiality obligations. This is not discretionary.

The AMC tests this explicitly — usually through a scenario where confidentiality appears to be in conflict with patient safety. The correct answer always prioritises safety.

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High-Yield Topic 3: Psychosis and Schizophrenia

Positive and Negative Symptoms

Positive symptoms (things added to normal experience):

• Hallucinations (auditory most common — command hallucinations are highest risk)

• Delusions (persecutory, grandiose, referential)

• Disorganised speech and behaviour

Negative symptoms (things subtracted from normal experience):

• Flat affect

• Alogia (poverty of speech)

• Avolition (loss of motivation)

• Anhedonia

• Social withdrawal

High-yield rule: Negative symptoms respond poorly to antipsychotic medications and are associated with poorer functional outcomes. This distinction is directly tested.

First-Episode Psychosis — Management

1. Safety assessment first — is the patient safe to self and others? 2. Medical causes excluded — organic psychosis (substance-induced, delirium, encephalitis, thyroid disease) must be ruled out before diagnosing primary psychotic disorder.

3. Antipsychotic initiation — after medical causes excluded. For first episode: low-dose atypical antipsychotic (risperidone or olanzapine first-line in Australian guidelines).

4. Metabolic monitoring — weight, fasting glucose, lipids before starting and at 3 months. Atypical antipsychotics carry significant metabolic risk.

5. Mental Health Act — if the patient lacks insight and refuses treatment, involuntary admission may be required.

AMC trap: Do not skip the medical cause exclusion step. A psychotic presentation in a patient who has recently used amphetamines or methamphetamine is substance-induced psychosis until proven otherwise. The first-line management is supportive, not antipsychotic initiation.

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High-Yield Topic 4: Bipolar Disorder

Distinguishing Type 1 vs Type 2

Feature	Bipolar I	Bipolar II
Manic episodes	Full mania (hospitalisation or psychosis may occur)	Hypomania only (no hospitalisation, no psychosis)
Depressive episodes	Present	Present and often predominant
Severity	More severe overall	Depression is the main functional impairment

High-yield rule: A single manic episode is sufficient to diagnose Bipolar I. You do not need multiple episodes.

Acute Mania — Management

1. Ensure safety — hospitalisation often required

2. Medications: Lithium (mood stabiliser), sodium valproate, or atypical antipsychotics (olanzapine, quetiapine) for acute mania

3. Benzodiazepines: For sedation and behavioural management in acute phase

4. Lithium monitoring: Requires regular serum levels. Narrow therapeutic index (0.6–1.0 mmol/L maintenance). Toxicity at levels >1.5 mmol/L — nausea, tremor, ataxia, confusion, seizures.

AMC trap: Antidepressants used without mood stabiliser cover in bipolar disorder can precipitate a manic switch. This is directly tested — the correct answer in a depressed bipolar patient is always a mood stabiliser (or mood stabiliser + antidepressant), never antidepressant alone.

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High-Yield Topic 5: The Mental Health Act

The Mental Health Act is the most distinctly Australian psychiatric topic in the AMC MCQ. Its specific provisions are directly tested.

Key Principles

(Note: Mental Health Act provisions vary by Australian state/territory. The AMC MCQ tests general principles applicable across jurisdictions.)

Criteria for involuntary admission (general principles):

1. The person appears to have a mental illness

2. The person requires treatment for that mental illness

3. The person poses a risk to their own safety or the safety of others

4. The person is unwilling or unable to consent to voluntary treatment

Who can initiate involuntary assessment:

• In most states, a medical practitioner (including a GP) can initiate an emergency psychiatric assessment order

• The actual involuntary admission and treatment order typically requires psychiatric review

AMC trap: The question will often ask whether a GP can admit a patient involuntarily. The answer is nuanced — a GP can generally initiate an emergency assessment order in most jurisdictions, but ongoing involuntary treatment orders require specialist psychiatric involvement. The specific threshold varies by state.

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High-Yield Topic 6: Substance Use Disorders

Alcohol Withdrawal

Timeline: Symptoms begin 6 to 24 hours after last drink. Peak severity at 24 to 72 hours. Risk of seizures: 24 to 48 hours. Delirium tremens: 48 to 72 hours (potentially fatal).

Assessment: CIWA-Ar scale (Clinical Institute Withdrawal Assessment for Alcohol) guides management intensity.

Management: Benzodiazepines are the treatment of choice for alcohol withdrawal. Thiamine (Vitamin B1) must be given before glucose in any malnourished alcohol-dependent patient — to prevent Wernicke’s encephalopathy.

AMC trap: Never give IV dextrose before IV thiamine in an alcohol-dependent patient. Glucose precipitates Wernicke’s in thiamine-depleted patients. This sequence error is a classic distractor.

Opioid Use Disorder

Management options:

• Methadone: Opioid agonist substitution therapy (daily supervised dispensing in early treatment)

• Buprenorphine/naloxone (Suboxone): Partial agonist — lower overdose risk, suitable for unsupervised dosing sooner

• Naltrexone: Opioid antagonist for relapse prevention (must be opioid-free for 7–10 days before initiation)

AMC trap: Do not initiate buprenorphine until the patient is in moderate withdrawal (COWS score ≥8). Initiating too early precipitates severe withdrawal.

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Study Strategy for Psychiatry

Allocate 2 dedicated weeks if Psychiatry is below 55% on your baseline mock. Do not spread it across a month — concentrated drilling produces faster improvement in this domain.

Memorise the three safety critical rules:

1. Plan + Intent + Means → psychiatric admission (voluntary or involuntary)

2. Thiamine before glucose in any alcohol-dependent patient

3. Never antidepressant alone in bipolar disorder

Use MplusX Psychiatry filters to drill 30 to 40 questions per session. Read every explanation. The Australian-specific content (SSRI choices, Mental Health Act principles, duty of care) appears in rationales and is essential for understanding why answers are correct.

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Frequently Asked Questions

Is Psychiatry hard in the AMC MCQ?

Psychiatry is highly learnable. The question types are predictable and the clinical rules are well-defined. Most IMGs who score poorly in Psychiatry do so because of under-preparation, not genuine difficulty with the content. Two focused weeks transforms this domain.

Do I need to know the specific Mental Health Act for each Australian state?

No. The AMC MCQ tests general principles of involuntary admission that apply across Australian jurisdictions. You do not need jurisdiction-specific knowledge. Focus on the general criteria: mental illness present, treatment required, safety risk, and refusal of voluntary treatment.

What are the most common Psychiatry mistakes in the AMC MCQ?

The three most common errors: (1) selecting outpatient management for a patient who needs admission due to active suicidal plan and intent; (2) choosing a TCA as first-line for depression; (3) initiating antidepressant alone in a bipolar patient.

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References

• John Murtagh’s General Practice (8th Edition): Chapter 20: Depression; Chapter 21: Anxiety disorders; Chapter 22: Bipolar disorder and schizophrenia.
• RACGP Red Book (10th edition): Chapter 7: Psychosocial preventive care.
• Therapeutic Guidelines (eTG): Part 2 Psychiatry: Psychotropic drugs.

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Disclaimer: This article is written for AMC MCQ examination preparation and general informational purposes only. It does not constitute medical advice, diagnosis, or treatment recommendations. Clinical decisions should always be based on individual patient assessment, current Australian Therapeutic Guidelines (eTG), and consultation with qualified healthcare professionals. MplusX is an exam preparation platform and is not a substitute for supervised clinical training.