Objective. To examine disclosure of side effects of nonsteroidal antiinflammatory drugs (NSAIDs) and to identify patient-and physician-specific factors associated with greater disclosure.Methods. Forty-six encounters between rheumatologists and new adult outpatients who were prescribed an NSAID they had not been taking prior to the visit were audiotaped. Reviewers coded the NSAID prescribed, specific side effects mentioned, demographic features of patients and physicians, and patient clinical characteristics. Neither patients nor physicians were aware that side effect disclosure was being studied.Results. A mean of 1.7 side effects was mentioned