What is the definition of substance abuse?

The definition of substance abuse is characterized by overindulgence in a chemical that leads to detrimental effects on health. This understanding highlights how the usage of substances, whether they are legal or illegal, can result in significant negative consequences for an individual's physical and mental well-being. Substance abuse is often marked by a pattern of behavior that not only affects the user but can also impact their social, occupational, and personal life.

This definition encapsulates the essence of substance abuse as it focuses on the harmful outcomes of excessive or irresponsible consumption. Unlike the other options, which either suggest positive changes or minimize the harmful impacts, this definition emphasizes the serious implications of such behavior, aligning with clinical perspectives on addiction and substance-related disorders.