Substance abuse behaviors refer to a range of activities or actions that involve the use of drugs or alcohol in a way that is harmful to the individual’s health, wellbeing, and daily functioning. These behaviors can include using drugs or alcohol in large amounts or over a prolonged period, using them despite negative consequences, craving them, and engaging in activities to obtain or use them, such as stealing or lying. Substance abuse behaviors can also include neglecting responsibilities at work, school, or home, social withdrawal, changes in mood or behavior, and engaging in risky or dangerous activities while under the influence of drugs or alcohol.