Drug prescribing is one of the most important parts of clinical practice. Yet it remains one of the most commonly failed components of undergraduate assessments, and accounts for an uncomfortably high proportion of medical errors. To remedy this, the Prescribing Safety Assessment (PSA) exam has been introduced in the UK. It is compulsory and will set a minimum standard for safe prescribing. Failure will preclude GMC registration. Pass the PSA is written specifically for the exam, with one chapter dedicated to each PSA section. Each chapter includes: - The marking scheme for the PSA exam section and how to approach it. - All the theory condensed into a few pages of memorable, illustrated text. - Multiple worked questions covering the most common exam scenarios. In addition: - Introduces a simple, memorable and failsafe approach to prescribing (the 'PReSCRIBER' mnemonic). - Specifies the universal basic principles of prescribing for all sections. - Over 300 worked questions, structured identically to the exam. - Data interpretation made memorable and simple including ECG, ABGs, chest X-rays and basic bloods. Common traps highlighted throughout. - Two mock exams.