What term describes the use of excessive quantities of mind-altering substances such as drugs and alcohol?

The term that accurately describes the use of excessive quantities of mind-altering substances, such as drugs and alcohol, is substance abuse. This concept encompasses patterns of consumption that lead to significant impairment or distress, such as negative effects on health, social relationships, and daily functioning. Substance abuse signifies a more severe level of involvement and consequence compared to other related terms.

In contrast, substance dependency typically refers to a state where the body adapts to the substance, resulting in tolerance and withdrawal symptoms if usage is reduced or stopped. Substance regulation does not represent a commonly recognized behavioral pattern related to substance use and instead might imply measures to control the distribution or consumption of these substances. Substance misuse, while also relevant, often describes the incorrect or inappropriate use of substances but does not necessarily indicate the level of excess or harmful consequences that characterize substance abuse. Therefore, substance abuse specifically refers to the hazardous or excessive consumption of drugs and alcohol, making it the most appropriate term in this context.