Opioid use research focuses on the study of the use, abuse, and addiction to opioid drugs, including prescription painkillers (such as oxycodone and hydrocodone) and illegal substances like heroin. This research area explores the impact of opioid use on individuals, families, communities, and society at large. It also examines factors influencing opioid use, such as the role of genetics, environmental influences, mental health issues, and access to healthcare. Additionally, researchers in this field study methods for prevention, treatment, and harm reduction related to opioid use.