A classic definition given by the World Health Organization can guide us in trying to understand what these substances we call drugs, and to know what preventive actions can be made:
WHO says: “Drug” is any substance which, introduced into the body through any route of administration, produces a somewhat altered from the natural functioning of the central nervous system of the individual and is also likely to create dependence, either psychological, physical or both.
Proper understanding of this definition tells us a lot about drugs:
Substances. Drugs are substances, which excludes the “drug addiction” behaviors such as compulsive gambling, watching too much television, video games, etc.. These behaviors of dependency or addiction are not set with a substance or drug.
All … Both the legal and illegal: the legal approach is not valid towards prevention. In fact, the most consumed drugs in our society that cause most problems are the snuff and alcohol permitted for use.

