PHARMACOLOGICAL PROBLEMS IN PATIENTS RECEIVING INITIAL ANTIRETROVIRAL THERAPY: AN APPROACH IN SECONDARY HEALTH CARE SARAH DE CARVALHO FREITAS ALVES1,6, KARLA DO NASCIMENTO MAGALHÃES1,2; HENRY PABLO LOPES CAMPOS E REIS1,6, MARAIZA ALVES TEIXEIRA1,5,6, NADIR KLEIR3,5,6, DAVID WOODS4,5,6, LUZIA IZABEL MESQUITA MOREIRA DA SILVA1,6, ANGELA MARIA DE SOUZA PONCIANO1,6, MARTA MARIA DE FRANÇA FONTELES1,5,6 1Universidade Federal do Ceará (UFC); 2Centro de Especialidades Médicas José de Alencar (CEMJA); 3Qatar University; Otago University; 4 5Instituto Nacional de Ciência e Tecnologia para Inovação Farmacêutica (INCT_if); 6Centro de Estudos em Atenção Farmacêutica (CEATENF) Since AIDS was discovered, many advances have been made to have a better understanding of its therapeutic management. This work aimed at investigating pharmacological problems related to antiretroviral therapy (ART) in HIV positive (HIV +ve) patients undergoing antiretroviral therapy (ART) attending a Medical Specialties Center (José de Alencar) in Fortaleza-Ceará, Brazil. Patient recruited in this descriptive and prospective study acted as their own controls, and data collection took place in the period from December 2008 to August 2010, using Dáder method for pharmacotherapy follow up. Pharmacological problems (PP) related to antiretroviral therapy were identified and classified according to an adapted version of the 2nd Consensus of Granada. The data were analyzed with Epi Info and Sigma Plot programs, setting the significance level at p <0.05. Of the 47 interviews conducted, 45 patients completed the follow up. A total of 643 PP related to antiretroviral drugs were identified. PP-5 (category: qualitative security) was the most prominent problem, followed by PP-4 (category: quantitative effectiveness) and PP-1 (category: patients knowledge about the drug therapy). The most frequently prescribed antiretroviral drugs were Zidovudine + Lamivudine, Lopinavir + Ritonavir and Efavirenz and were also the most problematic in terms of safety and effectiveness. Our findings suggest that the main obstacles and difficulties experienced by HIV+ve patients on ART are related to adverse drug reactions, which contributed to poor adherence to treatment in the secondary health care environment. The study received financial support from UFC; CNPq; INCT_if.