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Core information standard: CORE INFORMATION STANDARD IMPLEMENTATION GUIDANCE

3.28 Allergies and adverse reactions

Guidance on good practice recording of allergies and adverse reactions is provided by NICE (https://www.nice.org.uk/guidance/CG183/chapter/1-Recommendations).

A record should be provided of all allergic and adverse reactions relevant to the person. Coded information on causative agents is important to healthcare professionals to enable safe prescribing of medications.

When an individual is diagnosed with an allergy related condition (e.g. anaphylactic shock or urticarial skin rash) this will be entered in addition into the diagnosis field in the healthcare system and will need to be cross referenced into the problem list and prominently displayed there.

Where there is a diagnostic code for an allergy recorded in the system, the system should trigger an allergy entry. There is a significant risk to patient safety if allergies are not explicitly and prominently displayed.

Adverse reactions need to be treated in a similar manner.

Information about probability of recurrence may be included in the allergy comments element if this has been identified.

Page last updated: 06 January 2026