Depression and addiction are linked. It’s possible to experience them both at the same time, and one can even influence the likelihood of developing the other.
Someone who is depressed may seek addictive substances to numb emotions, or to escape a feeling of emptiness. Someone who has an addiction may become depressed due to the shame and destructive behaviors that come with substance abuse.
Understanding how depression and addiction interact is essential to support people when they are most vulnerable to either condition. Recognizing the link also informs treatment that guides people’s recovery from depression, addiction, or both. Let’s take a look at why they so commonly happen together and how integrated treatment helps.
The Relationship Between Depression and Addiction
Research shows that people who seek treatment for substance use disorders (SUD) have high rates of depressive disorders [1]. People with alcohol and drug dependence also have elevated rates of major depression [2]. Not only are people with an addiction more likely to experience depression, depression has been associated with worse clinical outcomes among substance-dependent people [3].
Meanwhile, people who have an SUD are up to 3 times more likely to have a mental illness [4]. Depression has been shown to be a predictor of addiction, specifically for alcoholism, and has also been associated with an earlier age onset of addiction [5] [6].
Being depressed does not mean that a person will definitely develop an addiction. Equally, having an addiction does not mean that a person will become depressed. The two increase the risk of the other developing but are not always causal.
Why Are Depression and Addiction Interconnected?
An intricate mix of biological and psychological factors affects the relationship between depression and addiction.
Depression and addiction both share common genetic and neurobiological pathways, meaning people who are genetically predisposed to depression may also be more susceptible to addiction [7].
Depression and addiction both affect the brain’s reward system, which may play a role in how they influence one another.
Psychological factors are slightly clearer: a person suffering from depression may turn to substances to self-medicate. A person with an addiction may make decisions and have a lifestyle that leads to depression. The more a person in either scenario is exposed to negative thought patterns and behaviors, the more likely they are to develop the counterpart condition.
The Risks of Co-Occurring Depression and Addiction
Co-occurring disorders, such as addiction and depression, are when someone experiences both disorders at the same time. They tend to exacerbate the symptoms of each condition, and require specialized treatment that looks at how the disorders relate, rather than as individual recovery journeys.
The main risks associated with co-occurring depression and addiction are:
- More severe depression symptoms
- Higher risk of suicidal thoughts and ideation
- Higher risk of overdose
- Increased substance use
- Further isolation from support networks
In 2022, more than 20% of people who had a fatal drug overdose had a non-substance-related mental health disorder. The most common disorder was depression [8].
What Is Integrated Treatment and How Does It Help?
Integrated treatment, also called dual diagnosis, is care for co-occurring addiction and mental health disorders such as depression. SAMHSA ranks dual diagnosis treatment as the number one best practice for co-occurring disorders [9].
Integrated treatment can be applied to detox, residential, outpatient, and aftercare programs. It’s personalized to each individual and factors in their clinical history and current addiction and mental health challenges. It uses evidence-based therapies such as Cognitive Behavioral Therapy (CBT), Dialectical Behavioral Therapy (DBT), and Eye Movement Desensitization and Reprocessing (EMDR) to address the underlying causes of addiction, as well as the triggers and unprocessed trauma of mental health disorders. Integrated treatment helps manage symptoms, but it also factors in nuances that inform more intricate and effective recovery efforts.
Medication may be an element of integrated treatment, whether to alleviate substance cravings and withdrawal symptoms, or to improve chemical balances in the brain that manifest as mental health disorders.
Activities such as yoga, mindfulness, hiking, and art therapy can feature in integrated treatment to support physical and mental wellness, and to encourage daily routines that lower the intensity of both depression and addiction.
The Effectiveness of Integrated Treatment
Integrated treatment is proven to help people struggling with depression and addiction. The key research takeaways include:
- Around half of people with co-occurring disorders responded well to an integrated treatment program [9].
- Co-occurring mood disorders, including depression, fell by up to 95% among people addicted to alcohol in a dual diagnosis program [10].
- The severity of substance use disorder reduced for more than three-quarters of patients in dual diagnosis treatment [11].
A Pathway Forward at Trinity Wellness Group, Massachusetts
We know that recovery looks different for each person: what works for someone with depression isn’t the same as what works for someone with depression and addiction.
At our center in Milton, MA we offer personalized integrated treatment. Our programs include evidence-based therapies, medication-assisted treatment (MAT) and medication management, and a range of holistic activities. Our team is licensed, trauma-informed, and empathetic — we never judge, we listen and we act according to your recovery needs.
You’re not your addiction or your depression. You’re worthy of help and you can heal. Speak with our admissions team about your next steps.
Sources
[1] Flynn, W. 2000. Dual Diagnosis and Treatment: Substance Abuse and Comorbid Medical and Psychiatric Disorders. The American Journal of Psychiatry.
[2] Regier, D. et al. 1990. Comorbidity of Mental Disorders With Alcohol and Other Drug Abuse. JAMA.
[3] Hasin, D. et al. 2002. Effects of Major Depression on Remission and Relapse of Substance Dependence. JAMA Psychiatry.
[4] CAMH. 2026. Mental Illness and Addiction: Facts and Statistics. camh.ca.
[5] Kuria, M. et al. 2012. The Association between Alcohol Dependence and Depression before and after Treatment for Alcohol Dependence. ISRN Psychiatry.
[6] Conner, K. et al. 2009. Meta-analysis of depression and substance use among individuals with alcohol use disorders. Journal of Substance Abuse Treatment.
[7] Olvera, RL. 2012. Common Genetic Influences on Depression, Alcohol and Substance Use Disorders in Mexican-American Families. American Journal of Medical Genetics.
[8] CDC. 2024. Reported Non–Substance-Related Mental Health Disorders Among Persons Who Died of Drug Overdose — United States, 2022. cdc.gov.
[9] Substance Abuse and Mental Health Services Administration.2009. Integrated Treatment for Co-Occurring Disorders: The Evidence. U.S. Department of Health and Human Services.
[10] Schoenthaler, S. et al. 2017. The effects of residential dual diagnosis treatment on alcohol abuse. Journal of Systems and Integrative Neuroscience.
[11] Brunette, M. et al. 2001. A Comparison of Long-Term and Short-Term Residential Treatment Programs for Dual Diagnosis Patients. Psychiatric Services.