Reframing Psychiatry’s Role in Population Mental Health from Biopsychosocial to Syndemic Care: A Narrative Review

Abstract

Introduction: Integrating mental health into primary care is essential for global health equity, yet large treatment gaps persist in low- and middle-income countries (LMICs), including Indonesia. Biomedical, disorder-specific models often miss the bidirectional links between mental disorders and physical multimorbidity, especially under conditions of structural stigma and social marginalization. This narrative review proposes a shift toward a syndemic-informed approach that addresses interacting mental, physical, and social drivers of illness. Methods: We conducted a narrative review of literature on mental health integration in primary care in LMICs, focusing on: (1) syndemic theory and mental–physical multimorbidity; (2) structural stigma and social determinants; and (3) transdiagnostic, evidence-based behavioral interventions. We synthesized evidence on scalable delivery strategies, emphasizing task-sharing models and brief interventions incorporating Cognitive Behavioral Therapy (CBT), Dialectical Behavior Therapy (DBT) elements, and Motivational Interviewing (MI). Results: Findings support a syndemic-informed framework in which mental illness, chronic disease, infectious syndemics (e.g., HIV), and adverse social conditions interact synergistically to worsen outcomes. Transdiagnostic behavioral interventions targeting shared mechanisms—particularly emotion dysregulation—may be more feasible and effective than diagnosis-specific care in resource-limited primary care settings. Task-sharing and stepped-care models show promise for improving access and implementation at scale. Conclusion: A syndemic-informed, transdiagnostic strategy offers a pragmatic pathway to integrate mental health into primary care in LMICs. By focusing on shared psychological mechanisms and scalable task-sharing delivery, primary care systems may better address intertwined mental, physical, and social burdens, advancing more equitable population-level outcomes.