Prescribing Safety Assessment (PSA) Mock Test

Overview of the Prescribing Safety Assessment (PSA)

The Prescribing Safety Assessment (PSA) is a high-stakes, competency-based digital examination developed jointly by the British Pharmacological Society (BPS) and the Medical Schools Council (MSC). In the United Kingdom, passing the PSA is a core requirement for Foundation Programme doctors (FY1) and has increasingly been integrated into advanced UK clinical pharmacy practice, independent prescribing pathways, and clinical therapeutics training. The assessment ensures that newly qualifying healthcare practitioners possess the essential foundational skills required to prescribe medications safely, accurately, and effectively in modern NHS clinical environments.

Administered via a specialized secure online platform, the assessment simulates day-to-day prescribing scenarios encountered across hospital wards, primary care general practice, and emergency departments. Candidates are expected to analyze patient histories, diagnose therapeutic challenges, navigate the digital British National Formulary (BNF), identify drug-drug interactions, and calculate precise pharmacological dosages under timed exam conditions.

Prescribing Safety Assessment Syllabus & Question Domains

The PSA blueprint covers eight core domains aligned with General Medical Council (GMC) and UK clinical pharmacy prescribing competencies:

1. Prescribing (Therapeutic Decision Making)

Candidates evaluate comprehensive clinical presentations and select an appropriate medication, route, dose, frequency, and duration. This domain tests your ability to weigh risk-benefit ratios, navigate renal or hepatic impairment dosing adjustments, and choose optimal first-line therapies based on National Institute for Health and Care Excellence (NICE) guidelines.

2. Prescription Review

This section presents an existing inpatient or primary care prescription chart alongside a patient case history. Candidates must systematically audit the medication list to detect prescribing errors, contraindicated combinations, duplicate therapies, inappropriate dosing, or drug interactions that pose immediate or long-term clinical risks.

3. Planning Management

Clinicians must select appropriate pharmacological management strategies for acute and chronic conditions. Questions evaluate knowledge of stepwise disease escalation, rescue therapies (such as acute asthma exacerbations or diabetic ketoacidosis), and supportive treatments.

4. Providing Information

Prescribing safely involves clear patient counseling. This domain focuses on selecting key information that must be communicated to patients, including potential adverse effects, red-flag symptoms requiring emergency presentation, missed-dose guidance, and necessary lifestyle precautions.

5. Calculation Skills

Accurate mathematical competence is paramount in pharmacotherapy. Items evaluate numerical conversions, infusion rate calculations (e.g., mL/hr or drops/min), weight-based pediatric or oncology dosing, and liquid medicine concentration calculations without clinical room for error.

6. Adverse Drug Reactions (ADRs)

Candidates identify causative agents responsible for clinical signs, symptoms, or abnormal laboratory findings, determine appropriate Yellow Card reporting criteria, and choose prompt therapeutic interventions to manage drug toxicity.

7. Drug Monitoring

This domain assesses the monitoring requirements for narrow therapeutic index medications (e.g., digoxin, lithium, theophylline, aminoglycosides, and direct oral anticoagulants), including baseline laboratory investigations, timing of serum trough levels, and response parameters.

8. Data Interpretation

Prescribers evaluate diagnostic data such as arterial blood gases, liver function tests, full blood counts, microbiology culture sensitivities, and therapeutic drug assays to guide medication decisions.

Exam Structure and Timing

The live national PSA examination comprises 60 questions administered over a strict 120-minute testing window (2 hours), equating to an average pace of two minutes per question. This mock test provides 40 representative items structured across the same high-yield domains to test speed, technical BNF navigation, and clinical knowledge. Because the exam features different item styles—including single best answer (SBA), extended matching questions (EMQ), free-text drug entry, and calculation entries—maintaining active time management is vital.

Test Rules and Allowed Resources

• Reference Material: Candidates have access to the digital version of the British National Formulary (BNF) and BNF for Children (BNFC) hosted via NICE during the examination.
• Calculators: An integrated on-screen basic scientific calculator is provided within the testing platform. Outside non-approved hardware calculators are strictly prohibited.
• Spelling and Formulation Accuracy: For free-text prescribing items, approved generic names must be spelled accurately. Trade names are only accepted when biologically or clinically indicated (e.g., specific insulins or modified-release preparations).
• Assessment Security: The exam is conducted under supervised exam-hall or remote-proctoring regulations. Independent browsing, unauthorized communication, and reference books outside the official BNF link are strictly barred.

Scoring System and Pass Mark Calculation

The PSA uses a standard-setting method called the modified Angoff method to determine the passing standard for each national sitting, supplemented by the Hofstee method. As a result, the pass mark varies marginally each year depending on paper difficulty, generally falling between 60% and 65%.

Different domains carry different mark weights:

• Prescribing items are typically worth up to 10 marks each, awarding partial credit for correct drug choice even if dosing intervals require refinement.
• Calculations require an exact numerical answer (often with units) and are marked on an all-or-nothing basis (typically 2 marks each).
• Prescription Review, Adverse Drug Reactions, and Monitoring award discrete point allocations for correctly identified errors and management steps. There is no negative marking.

Effective Preparation and Revision Strategies

1. Master the Digital BNF: Speed is the single biggest determinant of success in the PSA. Become familiar with the online search hierarchy, interaction checker, monitoring sections, and Appendix tables for renal dosing.
2. Practice Calculations Under Strict Timing: Practice unit conversions (micrograms to milligrams, percentages to mg/mL) repeatedly so calculation sections do not consume valuable prescribing time.
3. Learn High-Risk Drug Categories: Concentrate your revision on frequent prescribing topics: anticoagulation, antimicrobial stewardship, insulin regimens, emergency analgesia, cardiovascular medications, and intravenous fluids.
4. Audit Inpatient Charts Systematically: When approaching review questions, work through charts methodically by reviewing indication, dosing, route, interactions, and monitoring requirements.
5. Simulate Full-Length Mock Exams: Take timed mock assessments under realistic exam conditions to develop your pacing, ensure stamina, and eliminate careless typographical errors.