Surrey Traffic Light System

The colour classification of a medicine is assigned as advised by the PCN. Where necessary, clinicians should discuss the appropriate management of individual patients to ensure safe prescribing of medicines when care is transferred across the interface. On occasions both parties may agree to work outside of this guidance. In addition, some CCGs may have a variation to the PCN recommended colour classification.


For specialist use in secondary / tertiary care – prescribing to be initiated and continued by the specialist clinician.


Prescribing to be initiated by a hospital specialist (or if appropriate by a GP with specialist interest) but with the potential to transfer to primary care when formal shared cared arrangements have been established and the primary care prescriber has agreed to take over prescribing responsibility.

Blue (formerly Amber*)

Prescribers are generally happy to prescribe following specialist initiation without the need for a formal shared care protocol. The Prescribing Clinical Network (PCN) will decide if an information sheet is required for a specific drug and the recommended minimum duration of supply by the initiating specialist clinician.


These are drugs that can be initiated and/or continued in primary, secondary or tertiary care.


These are drugs that have been reviewed by the PCN and have been considered as not suitable for routine prescribing within Surrey. They are therefore not routinely recommended for prescribing in Primary or Secondary Care.

As such drugs classified as Black should be considered as non-formulary in Surrey Acute Trusts (Frimley Park Hospital, Ashford & St Peter’s Hospitals, Epsom & St Helier Hospitals, Royal Surrey County Hospital, Surrey & Sussex Healthcare NHS Trust).