Chemicals
The chemicals in all drugs interrupt the brain’s normal functions and overtime, the body will become so used to the normal dosage that it will need more and at a more frequent rate. This can cause users to take too much and possibly overdose which could lead to death. Additionally, the brain will become so used to the substance producing mood-boosting receptors that it will stop producing certain feelings naturally and the body will need the substance in order to function normally. People will become dependent and tolerant on the substance which is the beginning of addiction.
Brain Functioning
Through the use of neuroimaging, scientists are able to study brain waves and patterns in order to determine addictive qualities, as well as determine if patients are suffering from any underlying conditions. The neuroimaging shows certain parts of the brain that may be different than others which have significant effects on the susceptibility to addiction.
Genetics
Studies show that there is a certain gene found among well-over 60 percent of people who suffer from addiction. While this does not prove that addiction is 100 percent genetic, it does prove that there is a definite connection between your genetics and the susceptibility of developing an addiction.
Family History
The more people in a family who have an addiction or mental health disorder, the stronger the chances are developing an addiction or mental health disorder. Family history may also include children being exposed to a turbulent upbringing or a parent who suffers from a mental health disorder. Family history, like immediate environment, has a lot to do with whether or not someone will develop an addiction.
Immediate Environment
Being exposed to mass amounts of stress, coping with the loss of a loved one, being physically abused or experiencing a significantly traumatic experience are all things that may lead to addiction. Anything that causes you to want to self-medicate will always lead you to addiction.