Backgrounds: Heart failure (HF) patients are at high risk of having drug-related problems (DRPs) owing to multiple prescriptions and comorbidities. Objective: The study aimed to identify characteristics of patients who were admitted to the hospital during the study period and to analyze the potential drug related problem which are grouped as treatment effectiveness and adverse reactions that happened to hospitalized patients with heart failure at Koja District Hospital. Methods: Data were classified using the Pharmaceutical Care Network Europe Foundation (PCNE) classification system V6.2. A cross-sectional study was conducted using data from prescriptions, medication and laboratory records from February – April 2019. Data were included by consecutive sampling.  Results: A total of 111 patients participated in the study; Out of 111 patients, 68 (61,26%) were male, 67 (60,36%) were hospitalized for about 4-7 days,  44 pasien (39,64%) were in the age group of 41-60 years, 90 (81,08%) were prescribed loop diuretics, and the most frequent comorbidities was Coronary Artery Disease (CAD).  A total of 228 DRPs were identified. The identified problems were treatment effectiveness (67,10%) followed by unwanted drug reactions (32,90%) with the biggest cause of DRP was because of inappropriate combination of drugs, or drugs and food (47,03%).

Key words: Drug Related Problem, heart failure, hospitalized patients, PCNE V6.2