Studies of adults have found that anxiety disorders, in general, tend to be positively related to abuse of and dependence on both alcohol and/or illicit drugs. When this phenomenon occurs, it’s known as a dual diagnosis, which means a person has both an anxiety disorder and an addiction.
This leads to the question, what comes first, the anxiety or the addiction?
Pre-existing anxiety causing addiction
One explanation for this comorbidity is the self-medication hypothesis. It suggests that individuals with mood or anxiety disorders often turn to substances to cope with their difficult symptoms. For example, someone with social anxiety might use alcohol to feel more comfortable in social situations. Over time, this self-medication can lead to an independent substance use disorder, creating a cycle where they rely on the substance to function, worsening their overall mental health.
Pre-existing addiction causing anxiety
Pre-existing addiction can lead to anxiety in several ways, creating a challenging and stressful experience. Addiction changes the brain, especially the extended amygdala. This part of the brain is responsible for feelings of anxiety, irritability and unease during withdrawal, which often drives a person to seek the drug again. As drug use increases, this brain circuit becomes more sensitive. Over time, individuals with substance use disorder use drugs not to get high but to find temporary relief from these uncomfortable feelings.
Additionally, the psychological stress of living with an addiction, including the constant need to obtain and use the substance and the potential legal, financial and relationship problems, creates a high-stress environment that contributes significantly to anxiety.