Understanding the stages of drug addiction can help you recognize warning signs before substance abuse becomes severe. Addiction develops gradually through predictable phases, from experimental use to physical dependence. The American Society of Addiction Medicine defines addiction as a chronic brain disease involving changes in brain function and behavior. Whether you’re concerned about your own drug use or watching a family member struggle, knowing how addiction progresses gives you the power to take early action. This guide explains each stage of addiction, from first-time experimentation through regular use, dependence, and severe addiction. You’ll learn to identify signs of addiction at each phase, understand the difference between risky use and dependence, and discover when professional treatment becomes necessary. Recovery is possible at any stage with appropriate support, effective treatment, and ongoing commitment to change.