Oxycodone is a strong opioid painkiller used during surgery and severe injuries. It is helpful for short-term relief but long-term use and abuse can cause severe dependency and addiction. This addiction can cause serious cravings, anxiety, and irritability, which can affect your daily life. Before understanding addiction risk, symptoms, and treatment for oxycodone addiction, it is important to know how oxycodone is addictive which can help to preventing long-term harm.