MRCPsych Paper A is the scientific foundations paper. It covers behavioural science, human development, neurosciences, psychopharmacology, and classification. It is often described as the “basic sciences” paper of psychiatry — but make no mistake: it requires depth, not breadth.
In this guide, I will walk through the structure of Paper A, the high-yield domains, a proven study schedule, and the specific strategies that separate passing from failing.
Paper A Structure
Paper A consists of 150 multiple-choice questions (single best answer format) with a time limit of 3 hours. The mark distribution across domains is:
- Neurosciences: ~40 marks (27%)
- Psychopharmacology: ~33 marks (22%)
- Classification & Assessment: ~25 marks (17%)
- Psychological Models & Behavioural Science: ~25 marks (17%)
- Human Development: ~15 marks (10%)
- History & Philosophy: ~12 marks (8%)
Two sections — neurosciences and psychopharmacology — account for nearly half the paper. This is not an accident. The examiners want to ensure that every psychiatrist, regardless of future subspecialty, has a solid grounding in the biological sciences underpinning mental health.
The High-Yield Topics
Neurosciences (~40 marks)
This is the most feared section and the one that separates candidates. Key topics include:
- Neuroanatomy: Limbic system, basal ganglia, prefrontal cortex, hippocampal formation. Know the blood supply (anterior vs posterior circulation) and the functional consequences of lesions in each area.
- Neurophysiology: Synaptic transmission, neurotransmitter synthesis and degradation pathways (dopamine, serotonin, noradrenaline, GABA, glutamate, acetylcholine). The rate-limiting enzymes are a favourite question target.
- Neurochemistry: Receptor subtypes, second messenger systems, and the dopamine hypothesis of schizophrenia (the updated version, not the simplistic 1970s model).
- Neuroimaging: CT, MRI, fMRI, PET, SPECT — what each measures and when each is indicated. Functional imaging is increasingly common in recent papers.
- Neuropsychology: Lobar syndromes, memory systems (declarative vs procedural, episodic vs semantic), executive function, and the neurological examination of mental state.
Psychopharmacology (~33 marks)
This section rewards clinical pharmacology knowledge. The examiners are less interested in esoteric receptor profiles and more interested in practical prescribing:
- Antidepressants: Mechanism of action, side-effect profiles, and switching strategies. Know the STAR*D trial data (cumulative remission ~67% after four steps).
- Antipsychotics: Typical vs atypical differences, receptor-binding profiles, metabolic side effects (clozapine monitoring requirements, olanzapine weight gain, aripiprazole as partial agonist).
- Mood stabilisers: Lithium monitoring (renal, thyroid, calcium), valproate safety in women of childbearing potential, lamotrigine titration and Stevens-Johnson syndrome.
- Anxiolytics: Benzodiazepine equivalence, dependence risk, and the place of pregabalin in GAD.
- Drug interactions: CYP450 enzyme induction/inhibition is a recurring theme. Know the major CYP isoenzymes and their substrates.
Classification (~25 marks)
ICD-11 is now the standard, though ICD-10 still appears. Know the major diagnostic criteria for: depressive disorders, bipolar I and II, schizophrenia spectrum disorders, anxiety disorders, OCD, PTSD, and personality disorders (particularly borderline and antisocial).
The examiners often test the boundary between diagnoses — for example, when does bereavement become a depressive episode? When does suspiciousness become delusional disorder?
A 12-Week Study Schedule
Below is a schedule that has worked for trainees I have supervised. It assumes 6–8 hours of study per week (which is realistic for a full-time clinical job).
Weeks 1–4: Foundation
- Neurosciences (2 weeks): Read a core neuroanatomy text (or equivalent). Focus on pathways, not minutiae.
- Psychopharmacology (2 weeks): Mechanism-based learning. For each drug class, learn: mechanism → indications → side effects → interactions.
Weeks 5–8: Application
- Classification + assessment (1 week): ICD-11 diagnostic criteria for the 12 most common conditions.
- Psychological models (1 week): Behavioural, cognitive, psychodynamic, and social models of mental disorder.
- Mixed question practice (2 weeks): 50 questions per day with teaching cascade review.
Weeks 9–12: Exam Simulation
- Weekly timed mock exams (150 questions, 3 hours).
- Review every incorrect answer with the teaching cascade method.
- Blind-spot analysis: identify the bottom 3 domains and hammer them.
Common Mistakes
- The volume trap: Doing 1,000 questions without reviewing mistakes is worse than doing 200 with full review. The learning happens in the review, not the attempt.
- The dopamine hit: Questions you find easy feel productive but teach you nothing. An adaptive platform forces you to confront your weaknesses.
- Neglecting classification: Trainees assume they know ICD-11 criteria intuitively. They do not. Spend the time to memorise the core diagnostic requirements word-for-word.
PsychStar’s Paper A preparation package covers all sections with 2,300+ questions, an adaptive engine, and teaching cascades for every answer. You can try 5 questions free at psychstar.io/try.