What is defined as the misuse of drugs that affects health and ability to function?

The concept of substance abuse refers to the harmful or hazardous use of psychoactive substances, including alcohol and illicit drugs. This misuse typically leads to significant adverse consequences affecting an individual's physical health, mental health, and social functioning. Individuals who engage in substance abuse may find that their ability to function in daily life, maintain relationships, and fulfill personal or professional responsibilities is compromised due to their dependence on or excessive use of these substances.

The definition captures not just occasional misuse but a pattern of behavior that is detrimental over time. Substance abuse is commonly associated with various health issues, including addiction, mental health disorders, and chronic diseases, as well as substantial societal harms, such as increased crime rates and family dysfunction. Recognizing substance abuse as a serious health issue is essential for promoting effective interventions and support systems for affected individuals.