Detox (or detoxification) is the process by which your body clears drugs, alcohol, and their byproducts from your system. During active substance use, your brain and body adapt to the presence of these substances. Over time, this can lead to physical dependence, meaning you experience withdrawal symptoms when you cut back or stop using.(Source)

The primary goal of detox is to safely manage these physical withdrawal symptoms and stabilize you medically. Once your body is no longer physically dependent on the substance, you can move into the next phase of treatment, which focuses on the psychological, emotional, and behavioral aspects of addiction.

Because detox can be physically and emotionally intense, it is typically the first stage of a comprehensive treatment plan. Most rehab programs focus on therapy, relapse-prevention skills, and mental health support after detox is complete.

During detox, the brain must adjust to a sudden drop in chemicals such as dopamine, GABA, and others that it became dependent on during substance use. This adjustment can be uncomfortable and may cause withdrawal symptoms ranging from mild to severe. A medically managed detox program is designed to make this process as safe and comfortable as possible, often using medications and continuous monitoring by medical professionals.(Source)

Detoxing without professional help is sometimes possible for certain substances and milder use patterns, but it comes with significant risks, including severe withdrawal, relapse, and medical complications. For alcohol, benzodiazepines, and many opioid addictions, medical supervision is strongly recommended because withdrawal can be dangerous or even life-threatening.(Source)