Most small business owners are intuitively aware of what constitutes tax deductible marketing expenses, which include (but are not necessarily limited to) the costs of the following: Any sort of traditional advertising, such as newspaper ads, radio spots, brochures, and the like;
Mental/psychological dependence means somebody can't feel comfortable/relaxed anymore without the drug. This mechanism has nothing to do with the body, but with feelings of fear, pain, shame, guilt, loneliness and so on. The drug is used to forget problems which should be solved.
However, knowing the distinction between these terms can lead to a better understanding of the dangers of drug abuse. The most important distinction between these concepts is that tolerance and dependence refer to the physical consequences of drug use. In contrast, addiction is a descriptive term that refers to a need to engage in harmful behavior such as drug use.