Complete and Practical Prescriptions
Write an unambiguous prescription for one medicine or intravenous fluid with a usable formulation, dose, route and frequency.
How to prepare for the PSA
Combine patient-centred prescribing judgement with fast BNF navigation, reliable calculations, complete prescriptions and explicit monitoring and communication.
Core concepts
Concept 1
An official prescribing item requires one drug or one intravenous fluid on the specified prescription form.
Exam cue: Match the answer to the exact request: one drug or one intravenous fluid.
Concept 2
The answer must identify an appropriate medicine and provide a complete dosage using an approved name, usable formulation or strength, dose, route and frequency.
Exam cue: Read the finished prescription as an administrator would and remove any ambiguity.
Concept 3
A mathematically derived dose may need safe practical rounding to an amount that can actually be administered with available formulations.
Exam cue: Check that the calculated and selected dose can be delivered in practice.
Risk pitfalls and guardrails
Listing several alternatives instead of completing one prescription.
Guardrail: Do not let a familiar medicine, reference search or calculator output replace patient-specific safety checks and escalation.
Omitting the route, frequency, formulation or another essential dosage component.
Guardrail: Do not let a familiar medicine, reference search or calculator output replace patient-specific safety checks and escalation.
Entering a mathematically exact dose that cannot be measured or administered safely.
Guardrail: Do not let a familiar medicine, reference search or calculator output replace patient-specific safety checks and escalation.
Memory anchors
One Treatment
Prescribing items ask for one drug or, when stated, one intravenous fluid.
Drug Choice Marks
Five of the ten prescribing marks relate to selecting the drug.
Dosage Marks
Five marks relate to the dose, route and frequency together.
Unambiguous Order
A prescription must communicate one clear, complete and practical instruction.
Practical Dose
Round only when clinically appropriate and to a dose the available formulation can deliver.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
An adult has anaphylaxis with stridor and hypotension. Which proposed immediate medicine instruction is complete and correct for this training scenario?
An adult with suspected STEMI has no aspirin allergy or active bleeding. Which proposed instruction is appropriate?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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