Drug abuse involves the excessive and repeated use of a substance in reality, joy, despite their destructive effects to avoid. These substances can be abused, misused illegal drugs such as opium, cocaine, marijuana and their derivatives or legal substances such as drugs and inhalants like nail polish or gasoline. Addiction can be physical, psychological, or both. Physical dependence refers to physiological effects of drug use. On the other hand, with a drug to numb unpleasant feelings, to relax or to meet the need for examples of psychological dependence. Physical dependence is characterized by “tolerance” – the need for higher doses to achieve the initial effect and withdrawal symptoms when stopping the user. Signs and symptoms of drug abuse: – The more drug use begins to affect the life of a person, the more likely that the control he or she has a drug problem. Drug users often try to hide their symptoms and minimize their problems. However, there are a number of warning signs, you can search: · “Entering the erratic or suspicious behavior, such as making frequent trips to the bathroom, basement or other isolated areas where drug use would be quiet. Talking incoherently or making inappropriate comments ·. · Sudden changes in work or school and the quality of work or grades. · Conversation on drug use and pressure all the time on the other. To change · tantrums, mood swings, irritability, manic behavior, or attitude. · Expressing feelings of exhaustion, depression and despair. · Deterioration of physical appearance and maintenance. Frequently · borrow money, sell property, theft, or products of the employer, at home or at school. · Not spend more time with friends, not with drugs and / or dealing with established users. The path to drug addiction begins with the act of drug. Compulsive addiction, seek and use this skill even in the face of negative consequences consist of addiction. It is easier to prevent and reduce substance abuse in the early stages, before a person compulsively addicted to drugs.