Anxiety, depression, and suicidal thoughts are all common results of alcohol dependency. This is because prolonged heavy drinking effects the neurotransmitters in the brain which regulate mood. Two of the most important neurotransmitters for mood are dopamine and serotonin, which are responsible for creating the positive feelings vital for a healthy mind. Research shows that the levels of both serotonin and dopamine are often heavily altered in the brains of alcoholics, leading to deteriorating mental health and, often, a negative spiral of alcohol use.
Addiction is a chronic disease characterized by drug seeking and use that is compulsive, or difficult to control, despite harmful consequences. The initial decision to take drugs is voluntary for most people, but repeated drug use can lead to brain changes that challenge an addicted person’s self-control and interfere with their ability to resist intense urges to take drugs. These brain changes can be persistent, which is why drug addiction is considered a "relapsing" disease—people in recovery from drug use disorders are at increased risk for returning to drug use even after years of not taking the drug.