Physical addiction or psychological addiction Is there a real difference?

Using a substance (such as a painkiller, antidepressant, narcotic, sedative or other drug) without medical supervision or in larger quantities than prescribed is substance abuse. This does not mean that the individual is addicted or dependent on the substance. Addiction, the “worst” of the three if you will, is a mental disease where the user is dependent on the substance and continues to use it despite its harmful effects on the individual or their family.