What does the term "substance use disorder" include?

The term "substance use disorder" encompasses both substance abuse and substance dependence, making the choice of both terms the correct interpretation of the definition.

Substance abuse refers to a pattern of harmful use of any substance for mood-altering purposes, while substance dependence is characterized by a compulsive need to use the substance, often leading to tolerance, withdrawal symptoms, and a lack of control over use. Recognizing that substance use disorder includes both aspects is important for understanding the full spectrum of issues related to drug and alcohol misuse, which can impact various aspects of a person's life, including their health, relationships, and job performance.

In clinical settings, understanding this comprehensive definition allows for better diagnosis and treatment approaches to address the multifaceted nature of addiction. It emphasizes that both the behavioral aspects of abuse and the physiological aspects of dependence are integral to the disorder.