Which term best describes the behavior of a man who frequently uses methamphetamine but struggles to fill orders due to being high?

The term that best describes a man who frequently uses methamphetamine but has difficulty fulfilling orders because he is high is abuse. Substance abuse refers to the harmful or hazardous use of psychoactive substances, including methamphetamine, that leads to significant adverse consequences, such as impairment in social or occupational functioning. In this scenario, the man's frequent use of methamphetamine interferes with his ability to perform work tasks effectively, which is a clear indicator of the negative impact of substance use on his life.

The other terms are related to substance use but do not capture the essence of the situation as well. Dependence refers to a condition where the individual becomes physically or psychologically reliant on the substance, often experiencing withdrawal symptoms when not using it. Tolerance implies that over time, the individual needs larger amounts of the substance to achieve the same effects. Withdrawal describes the symptoms that occur when the substance is reduced or stopped after prolonged use. While these terms address different aspects of substance use, they do not specifically highlight the behavior of using methamphetamine in a way that causes problems in fulfilling responsibilities.