Addiction is defined as a disease by most medical associations. Like diabetes, cancer and heart disease, addiction is caused by a combination of behavioral, environmental and biological factors. Addiction involves changes in the functioning of the brain and body. These changes may be brought on by risky substance use or may pre-exist. The consequences of untreated addiction often include other physical and mental health disorders that require medical attention. If left untreated over time, addiction becomes more severe, disabling and life-threatening
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