Not everyone who tries a drug will become addicted to it. Some researchers are looking into the possibility that some people have a genetic predisposition to using drugs.
Feeling-seeking behavior:
The Dopamine D2 receptor A1 gene has been found to be more common in alcoholics and cocaine abusers than it is to the general public. Researchers believe this gene is linked to compulsive or feeling-seeking behavior. However, some people in the general public have this gene without a problem of addiction. Scientists are still working on finding out the exact meaning behind this gene, and genetic causes of drug addiction.
Vicious Cycle behavior:
Once a person becomes a drug abuser, they very easily can become addicted. The positive reinforcements of using drugs are often getting “high,” escaping pain, and feeling good. But, once a person becomes a habitual abuser, the negative aspects come out when a person is not using. Physical withdrawal symptoms such as nausea, pain, and shaking may occur. Psychological symptoms such as depression and the inability to experience pleasure can also develop. Therefore, people become addicted not to continue the positive reinforcements, but because they cannot overcome the negative ones.
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