As we have already emphasized, the characteristic of addiction is often a strong, occasionally disturbed desire or an inanimate longing for taking substances or drugs, alcohol or tobacco. Therefore, dependence on a substance is a chemical addiction. In chemical dependence we include dependence on drugs, alcohol, various medications, etc. Many addicts show a reduced ability to control with regard to the beginning, completion and amount of substance consumption. In order to induce the action of the substance achieved in small doses, increasing and higher doses are required, where often There is an exaggeration in doses, and often the consequences can be fatal. The Most Widespread Chemical addiction is drug addiction. Drugs have a psychacytic effect on the central nervous system. They reduce the sensation of pain, cause drowsiness or alertness, hallucinations or disturbances in brain functions, opinion, behaviour, and longer intake can lead to social and health problems. The Properties of the drug have some medications. Then It is about their misuse and not of useful use. Most of today’s drugs are not drugs or are no longer used as drugs (heroin, cocaine, marijuana, hash). However, a significant proportion of drugs are very valuable drugs without which modern medicine can not even imagine. Among them are the means to silence the pain (opiates), means for sleeping (hypnotics) and tranquilization (sedatives).
Based On their psychoactive effects, the drug can be divided into three large groups:
1. Psychedelepressore – Drugs with psychedelic action on the central nervous system, which cause central nervous system depression, lead to calmness and intoxication
2. Psychostimulators – Drugs with psychostimulative action on the central nervous system, which stimulate physical and physical activity
3. Hallucinogens – Drugs that affect the central nervous system by altering psychic reactions, cause hallucinations (disorders of thought and sensation), lead to an unreal experience of the world.