The drug information network is the United Kingdom National Health Service (NHS) is described. The NHS was reorganized in 1974 resulting in the creation of 14 regions, which were further divided into areas. Drug information services provided within the regions and coordination between regions have evolved into a decentralized national drug information network. In this network, regional centers provide support to their area centers; difficult questions received by area centers may be referred to the regional center. Additionally, some regional centers have become specialized in particular fields. All regional centers have access to data held by other regional centers. Activity is further coordinated by a literature abstracting service in which each regional center has certain responsibilities; a code of practice for drug information pharmacists; production of specialty bulletins; and standardized education and training. Future plans for expanded services are described.