Introduction: Haldol Decanoate is a first-generation antipsychotic effective against the positive symptoms of psychosis, namely delusions and hallucinations. In addition, the medication also exerts a sedative action in conditions of psychomotor agitation. Objective: To identify sociodemographic aspects, diagnosis and administration of Haldol Decanoate in patients of a Psychosocial Care Center. Method: This is a documental study, with quantitative design, collected from medical records of users of a Psychosocial Care Center in Northeast Brazil. Data collection was carried out from June to August 2022. 75 medical records were identified, of these, 51 met the criteria of this study and compose the research sample. Results: The medical records of patients using Haldol Decanoate in the referred institution presented with higher prevalence: age between 31 and 40 years, male gender, single marital status, base diagnosis Schizophrenia and with dose interval of Haldol Decanoate of 15 days, making use of 1 ampoule. Conclusion: The identification of the users' profile and the characteristics inherent to the outpatient use of Haldol Decanoate are important for the improvement, implementation and prioritization of strategic actions for health professionals, managers and public policy makers, influencing an efficient mental health care.