Among the signs of drug use, we can distinguish external psycho-social signs and physiological. Let's look at these signs in order. Among the behavioral, socio-psychological signs of drug use, we can distinguish:

-Change in human behavior: either increased fatigue, or vice versa - hyperactivity.

-Change the circle of communication of a person, the appearance of new friends who arouse suspicions of their behavior (usually, such friends are more experienced addicts).

-Changing the regime of the day, a person may suffer from insomnia, or vice versa, sleep more than usual.

-frequent change in mood, a person does not want to enter into a dialogue, and as a rule, in communication is limited to short phrases.

- telephone conversations, during which the drug addict goes to a place where the content of the conversation will not be heard. A person tries to speak quietly, uses incomprehensible words in the conversation.

-Previous interests do not cause a drug addict's past reaction. A person throws his interests and hobbies.

- one of the most common signs of drug dependence is the loss of valuables. As a rule, it is either jewelry or expensive household appliances (smartphones, laptops, cameras), which are easy to pass in a pawn shop and get money for them.

-Another characteristic feature - when trying a serious conversation, a person evades dialogue and begins to invent fictions. It is difficult to get any comments about lifestyle changes from drug addicts.

-In schoolchildren and students, drug use causes a drop in interest in learning, and as a result - a catastrophic decline in academic performance.

-Another characteristic sign of drug dependence is a change in clothing and appearance. As a rule, a person does not follow the appearance, becomes untidy, forgets about personal hygiene.