Research of the drug usage touches many questions, some of which are addressed in this paper: measurement and prediction of the drug consumption level among population, drawing up a characteristic of people who uses drugs. But many other questions which are rather a pure sociology could be asked: what are the reasons of a person to use drugs and how to reduce level of illicit drug usage. To get a chance to answer these questions many aspects of the drug usage should be analyzed.
Like many social processes, drug usage analysis gives a lot challenges because many hardly formalized factors should be taken into account. For example different types of drugs have different