[Assessment of adherence to antiretroviral drugs in a municipality in southern Brazil].

The aim of this research is to assess predicting factors and adherence levels to antiretrovirals through self-report and the date of drug retrieval. It is a transversal study in which 67 patients were interviewed. Patients who used more than 90% of doses were considered to have complied with the treatment. Results of adherence were: self-reports (72.7%); calculated using dosage forgotten on the last day (70%); in three (76.1%) days; in seven (80.5%) days; and in fifteen (80.5%) days; calculated using the date of drug retrieval in a period of three (53.7%) months; and in six (47.8%) months. Variables significantly associated with adherence were: educational level, living with the family, refer good adherence, positive assessment of the antiretroviral therapy, a diagnosis of an opportunistic disease, NADIR greater than 200 cells/mm(3) and being in first-time treatment. To improve adherence rates individual and collective strategies should be elaborated taking into account factors which have been identified as negatively effecting adherence.