RATIONALE: Chronic non-cancer pain (CNCP) is a leading driver of disability. Primary care clinicians treat most patients with CNCP. Yet, they are often unable to identify appropriate pain treatments, mainly due to concerns about the safety and effectiveness of available medications. Clinical practice guidelines (CPGs) can be useful tools to guide primary care clinicians in selecting pain treatments based on the best available evidence. OBJECTIVES: To undertake a systematic review of CPGs that address the management of adults with CNCP, regardless of underlying condition type, in primary care. METHOD: We systematically reviewed and synthesised current CPGs for managing adults with CNCP in primary care (2013-2023). We followed a stepwise systematic process to synthesise key CPG recommendations: extracted and analysed each recommendation, synthesised by compiling similar recommendations using a thematic analysis approach, and assessed the strength of CPG recommendations to create a final, unified set of recommendations. We focused on identifying CPGs containing recommendations on the following topics: (a) opioid pain management, (b) non-opioid pharmacological pain management, (c) non-pharmacological pain management, and (d) patient-centred communication around pain management, prevention, and organisation of care. RESULTS: We included 13 CPGs, 8 of which focused solely on use of opioids, emphasising the lack of long-term effectiveness and safety concerns, being mainly based on the expert consensus. As an exception, high-quality evidence recommended referring patients with suspected opioid use disorder to specialist addiction services for medication-assisted treatment. Recommendations for non-opioid pain management were often contradictory and based on the expert consensus. Patient-centred pain management combined with exercise-based interventions and psychological therapies are appropriate strategies for managing patients with CNCP. CONCLUSION: Most CPGs focused on opioid management, with contradictory recommendations for non-opioid management based on low-quality evidence. Additional research is needed to strengthen the evidence for using non-opioid and non-pharmacological interventions to manage patients with CNCP.