Psychiatry is one of those blueprint areas where candidates lose marks not because they lack clinical knowledge, but because they apply the wrong framework. The UK approach to mental health — legally, ethically, and therapeutically — has its own logic, and the single-best-answer format will test whether you know that logic precisely.
Why UK Psychiatry Feels Different to IMGs
In many training systems outside the UK, psychiatry questions centre on diagnosis and pharmacology. PLAB 1, aligned to the UKMLA blueprint, goes further. It asks you to decide who has the authority to act, under which legal provision, and what the safest next step is — not just what the diagnosis is.
The Mental Health Act 1983 (as amended in 2007) is the legal backbone. The Mental Capacity Act 2005 sits alongside it, governing patients who lack capacity but are not being detained for a mental disorder. Knowing which piece of legislation applies in a given scenario is, by itself, a high-yield skill for psychiatry PLAB questions.
The other shift is cultural: UK psychiatry is explicitly recovery-oriented and community-based. The default is always the least restrictive option. That principle echoes through correct answers on the exam.
The Mental Health Act Sections You Must Know
You do not need to memorise the entire Act. You need fluency in the handful of sections that appear repeatedly in clinical scenarios.
Section 2 — Admission for assessment. Lasts up to 28 days. Requires two medical recommendations (one approved under Section 12) and an Approved Mental Health Professional (AMHP). Used when the diagnosis is unclear or the patient has not been detained before.
Section 3 — Admission for treatment. Lasts up to six months, renewable. Requires the same process as Section 2 but is used when the diagnosis is established and treatment is needed.
Section 4 — Emergency admission for assessment. Lasts up to 72 hours. Only one medical recommendation needed — typically from a GP. Used when waiting for a second doctor would cause unacceptable delay.
Section 5(2) — Doctor's holding power. A registered medical practitioner (usually the responsible clinician or their nominated deputy) can detain an already-admitted informal inpatient for up to 72 hours. This does not apply to outpatients or A&E attendees who have not been admitted.
Section 5(4) — Nurse's holding power. A registered mental health or learning disability nurse can detain an informal inpatient for up to six hours while a doctor is summoned.
Section 136 — Police power. A police officer can remove a person from a public place to a place of safety for up to 24 hours (extendable to 36 with authorisation) if they appear to have a mental disorder and are in immediate need of care.
The exam loves the edge cases: a patient who self-discharged from the ward (Section 5(2) cannot be applied retrospectively), a patient in A&E who has not been formally admitted (Section 5 does not apply — you need to use common law or the Mental Capacity Act if they lack capacity), and scenarios where the nearest relative objects to a Section 3 application.
Risk Assessment: Thinking the UK Way
Risk assessment in the UK is structured, documented, and multidisciplinary — and the exam reflects this. For PLAB 1, the key is understanding what factors increase risk and what the appropriate response is at each level.
For suicide and self-harm, NICE guidance emphasises a full psychosocial assessment rather than a simple triage tool. In a single-best-answer question, the correct next step after a paracetamol overdose is rarely just "treat the overdose and discharge." It is treat medically and arrange a full psychosocial assessment before any decision about discharge.
Static risk factors you should know: male sex, older age, previous attempts (the strongest predictor of future attempt), psychiatric diagnosis, substance misuse, social isolation, and recent significant loss.
Dynamic (modifiable) risk factors matter too: hopelessness, access to means, recent disengagement from services, and current suicidal intent with a specific plan.
In the exam, a question asking about the single most important predictor of suicide is almost always pointing to previous attempts. Questions asking about immediate management are testing whether you prioritise safety and assessment over premature discharge.
Depression and Psychosis: First-Line Management, UK Style
Depression
NICE guidance recommends a stepped-care approach. For mild to moderate depression, the first step is a low-intensity psychological intervention — typically guided self-help based on cognitive behavioural therapy (CBT) principles, or a structured group programme. Antidepressants are not first-line for mild depression in adults unless the patient has a history of moderate or severe depression, or psychological therapy has not worked.
For moderate to severe depression, a combination of antidepressant medication and psychological therapy is recommended. The first-line antidepressant class in UK practice is a selective serotonin reuptake inhibitor (SSRI). If you are asked which specific agent, sertraline has a favourable safety and interaction profile and is widely used as a first choice.
Psychosis and Schizophrenia
For a first episode of psychosis, NICE guidance recommends referral to an Early Intervention in Psychosis (EIP) team as soon as possible — this is a UK-specific service structure that appears in exam scenarios. Oral atypical (second-generation) antipsychotics are first-line. Clozapine is specifically reserved for treatment-resistant schizophrenia (defined as an inadequate response to at least two different antipsychotics) and requires mandatory monitoring because of the risk of agranulocytosis.
In the exam, if a question describes someone already on two antipsychotics without adequate response, the correct next step is almost always clozapine — not a dose increase or switching to another standard agent.
Drilling these management pathways as single-best-answer questions — and reviewing the detailed explanations when you get one wrong — is the most efficient way to consolidate this material. The Ant PLAB question bank includes a dedicated psychiatry module with analytics that show you exactly which blueprint sub-areas need more work, so your revision time goes where it matters most.
Pulling It Together for Exam Day
Psychiatry PLAB questions reward candidates who slow down and ask three things before selecting an answer: Does this patient have capacity? Is detention under the Mental Health Act appropriate, and if so, which section? What does NICE guidance say is the first step — not the most dramatic step?
The least restrictive, evidence-based, safety-first option is almost always correct. If you find yourself choosing a section that requires more doctors than the scenario provides, or reaching for clozapine before two antipsychotic trials have been documented, re-read the stem.
Practice under timed conditions, review your weak areas systematically, and trust the framework. The UK approach is logical once it is familiar.
FAQ
Which Mental Health Act section is most commonly tested in PLAB 1? Section 2 and Section 5(2) appear most frequently, often in scenarios where candidates must distinguish between admitting a new patient (Section 2) and detaining someone already informally admitted (Section 5(2)). Knowing the duration and who can apply each section is essential.
Is CBT or medication first-line for depression in the UK? For mild to moderate depression in adults, NICE guidance recommends a low-intensity psychological intervention — such as guided CBT-based self-help — before antidepressants. SSRIs become first-line when depression is moderate to severe, or when psychological therapy has not been effective.
When is clozapine indicated in PLAB 1 questions? Clozapine is indicated for treatment-resistant schizophrenia, which in UK practice means an inadequate response to at least two different antipsychotics given at an adequate dose and duration. It is not a first- or second-line agent, and questions testing this will usually make the treatment history explicit in the stem.