Background: This study evaluates the benefits of integrating behavioral health and trauma services for Latinas with a history drug use. Changes in quality of life (QOL) domains were documented after participation in a manualized intervention in a cohort of Latinas. Methods: Participants were part of a prospective cohort study of 136 Latinas with co-occurring disorders (COD) who may have experienced trauma and receiving services in our outpatient treatment facility in Bayamon, Puerto Rico. The WHOQOL-BREF Spanish version was used to score physical, psychological, social, and environmental QOL domains, at intake and after six months. Sociodemographic variables, alcohol, drug use, mental health disorders, and severity of substance use disorders (as defined by the DSM-5) were also tabulated. Descriptive statistics and paired t test or the Wilcoxon signed-rank test were computed for comparison. Results: A median age of 39 years was seen and with 76% high school education or higher degree. The majority were unemployed (95.9%). A diagnosis of severe cocaine use (51.4%) was present and almost half (49.5%) had three or more DSM-5 diagnoses. Mean QOL scores were higher at six months with statistically significant differences in each domain. Women with neurodevelopmental disorders and schizophrenia yielded higher mean QOL scores for each domain at six months except for the social domain. Women with polydrug use and women who reported exposure to trauma and depressive disorder experienced statistically significant increments in the physical, psychological and social domains in comparison to counterpart women. Conclusions: Significant and positive changes in QOL were found in each domain. Latinas who reported traumatic events had lower scores in the physical and psychological QOL domains. There was a high prevalence of diminished physical and mental functioning in Latinas with COD. The exposure to trauma and the lack of social support negatively affect treatment access and retention for Latinas.