The report of the Expert Group on the Establishment of a Protocol for the Prescribing of Methadone set out recommendations for the involvement of general practitioners and community pharmacists in methadone maintenance programmes. It recommended that general practitioners should become involved by taking on responsibility for the care of opiate dependent persons who had first been stabilised at community drug treatment centres. It also outlined the criteria necessary to ensure that methadone prescribing occurred in a controlled, responsible fashion. Many elements of the protocol have been implemented. Most notably, a central treatment list of patients being prescribed methadone has been established. Under this arrangement a general practitioner who is considering prescribing methadone for a patient can check whether the patient's name is on this treatment list and so minimise the possibility that the patient concerned is receiving methadone from more than one source.