e24078 Background: Effective pain management in cancer care is crucial for patient quality of life. Shared decision-making (SDM) interventions are increasingly recognized for their potential to improve patient outcomes by facilitating patient engagement in care decisions. This systematic review synthesizes evidence on the impact of SDM interventions in cancer pain management. Methods: This systematic review adhered to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We conducted a comprehensive search across multiple databases, including PubMed, EMBASE, Scopus, CINAHL, PsycINFO, Web of Science, and the Cochrane Library. The search also extended to grey literature sources such as conference proceedings, dissertations, and unpublished reports to ensure a thorough coverage of the subject matter. Our search strategy employed a combination of MeSH terms and keywords related to 'decision making,' 'patient participation,' 'pain management,' and 'cancer.' This strategy was tailored to each database's unique syntax and search operators. Results: Ten studies, including six pilot and feasibility studies and four randomized controlled trials (RCTs) and Preintervention-Postintervention studies, were systematically reviewed. The interventions implemented diverse SDM strategies ranging from digital tools and personalized education to clinical decision support systems, targeting key aspects of pain management and patient-provider communication. Frequent intervention components included patient-reported outcome dashboards, symptom management support, and educational resources for pain management. The Tailored Education and Coaching (TEC) intervention notably increased pain-specific patient communication by 31%, while the PAINRelieveIt intervention did not significantly impact analgesic adherence but effectively reduced pain misconceptions among caregivers. Some interventions, like the Carevive CPS, showed high patient involvement in SDM (94.1%) and compliance with quality oncology practice initiative metrics (98%). However, the effectiveness of these interventions varied, with some showing no significant impact on primary pain outcomes. The variability in measured outcomes such as pain intensity, analgesic adherence, and patient satisfaction indicates a context-dependent effectiveness of SDM interventions, highlighting the importance of personalized approaches and the role of implementation strategies in influencing patient engagement and intervention success. Conclusions: SDM interventions in cancer pain management are diverse in structure and impact. Some interventions show promise in improving communication and reducing misconceptions, but their direct effect on pain outcomes varies.