title: Prescription-event monitoring: methodology and recent progress.
abstract: Event monitoring was first suggested 25 years ago as a way of detecting adverse reactions to drugs. Prescription-event monitoring (PEM), which has been developed by the Drug Safety Research Unit, is the first large-scale systematic post-marketing surveillance method to use event monitoring in the U.K. PEM identifies patients, who have been prescribed a particular drug, and their doctors from photocopies of National Health Service prescriptions which are processed centrally in England. A personalized follow-up questionnaire ("green form") is mailed to each patient's general practitioner, usually on the first anniversary of the initial prescription, asking for information about the patient, especially any "events" that he or she may have experienced since beginning treatment with the drug. The methodology of PEM is presented, together with examples of analyses that can be performed using results from recent studies. The problems and benefits of PEM are discussed.
authors.affiliation: Drug Safety Research Unit, Southampton, U.K.
authors.forename: N S
authors.initials: NS
authors.lastname: Rawson
authors.forename: G L
authors.initials: GL
authors.lastname: Pearce
authors.forename: W H
authors.initials: WH
authors.lastname: Inman
mesh_terms: D011307:Drug Prescriptions; D064420:Drug-Related Side Effects and Adverse Reactions; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D008838:Microcomputers; D011358:Product Surveillance, Postmarketing; D012042:Registries; D013222:State Medicine; D011795:Surveys and Questionnaires; D013997:Time Factors; D006113:United Kingdom