The intersection between AOD, mental health, and violence represents complex combinations of unmet need, however little is known about these associations in acute community settings. Ambulance paramedics are a frontline health treatment and transport service, whose records are a potential source of information about acute harms. This study seeks to better understand trends and patterns of AOD, mental health symptomology and self-harm where they co-occur with violence. This study will utilise patient care records that are routinely completed by paramedics, extracting information regarding AOD, mental health and violence. Study findings will provide evidence for development of policy and prevention strategies.