The mature trait of objective self-awareness is quickly lost and does not return when the drug use has stopped. The brain is a chemical organ of the body. These networks carry all of the functions of thinking, feeling, movement, as well as the senses of the human body. Each neuron is fired by chemical reaction at the beginning of the cell. The electrical impulse moves through the cell as a result of chemical reaction.
All mood altering drugs affect the process of chemical transmission in neuron networks.
As drug and alcohol use becomes regular and abusive, the chemistry of the brain is increasingly distorted. Distortion of the chemical process results in a number of specifically observable changes in the adolescent. The adolescent has trouble controlling impulses, thinking through a problem to a reasonable solution, getting new information into memory, recovering information already stored in memory, and new learning in general. In addition, the developing system of reasoning with reference to appropriate social behaviour, responsibility and moral behaviour is impaired to the point that it does not exist. Some of these basic forms of human thinking and behaving have been developed by the teenager in the process of maturation, and then are lost.