What’s the Link Between Addiction and Personality Disorders?

Personality disorders: There is a lot of baggage, and many myths, that come with this phrase. But one irrefutable truth is that there is a strong link between addiction and personality disorders. Read on for an in-depth look at the science behind this link.

Having a personality disorder is often confusing and scary for both the patient as well as his or her family or loved ones.

Personality disorders are difficult to treat, especially when they occur alongside a substance use problem. But addiction and personality disorders often go hand in hand and both issues need to be addressed simultaneously in order for an addicted person to have the best chances of staying sober in the long term.

The link between mental illness and addiction goes both ways. About 50% of people with a severe mental illness are also affected by a substance problem. Moreover, roughly 37% of alcohol abusers and 53% of drug abusers have at least one other serious mental illness.

Although statistics for South Africa are not available, in the United States it is estimated that 69% of all the nation’s alcohol and 84% of all the cocaine used in that country is consumed by people who have been diagnosed with another mental illness at some point in their lifetime.

When another mental illness occurs alongside addiction it is termed dual diagnosis.

What are personality disorders?

A personality disorder is a mental disorder “in which you have a rigid and unhealthy pattern of thinking, functioning and behaving”. This causes problems when it comes to reacting appropriately to situations and within relationships. These difficulties can lead to significant problems in social situations as well as with work or school.

An affected person usually develops a personality disorder, or disorders, during their teenage years or in early adulthood. It is often difficult to identify and accept that you have a personality disorder because your way of thinking seems normal and natural to you.

It is estimated that about 6% of the global population has at least one personality disorder.

The most common personality disorder is obsessive-compulsive personality disorder, followed by narcissistic personality disorder and borderline personality disorder.

These disorders are grouped into three types or clusters.

Cluster A personality disorders are characterised by strange, peculiar and eccentric ways of thinking and behaving. Cluster A includes:

  • Paranoid personality disorder
  • Schizoid personality disorder
  • Schizotypal personality disorder

Read: What’s the link between addiction and Cluster A personality disorders?

Cluster B personality disorders are marked by dramatic, exaggerated, excessively emotional or unpredictable thinking and behaviour. Cluster B includes:

  • Antisocial personality disorder
  • Borderline personality disorder
  • Histrionic personality disorder
  • Narcissistic personality disorder

Read: What’s the link between addiction and Cluster B personality disorders?

Cluster C personality disorders are characterised by heightened anxiety as well as fearful thoughts and actions. Cluster C includes:

  • Avoidant personality disorder
  • Dependent personality disorder
  • Obsessive-compulsive personality disorder

Read: What’s the link between addiction and Cluster C personality disorders?

Addiction and personality disorders

Safe, confidential and thorough treatment helped me through a very difficult period in my life. Changes provided me with tools and skills to manage my illness and introduced me to a supportive network of people.

Google Reviews★★★★★

I'm proud of the family we are at Changes and the work we do because it comes from our heart and care. Due to that care, we change lives. Changes Treatment Centre is where we make change without fear.

Google Reviews★★★★★

Grateful and thankful. I cannot express enough how much Changes has helped me and my family. Their support and care have been invaluable throughout this journey. We are forever grateful for their assistance.

Google Reviews★★★★★

If you are reading this wondering whether Changes is the right treatment center for you, I am telling you that it is. Changes has made a significant difference in my life and I couldn't be more grateful.

Google Reviews★★★★★

Tonight I attended a very informative support group hosted by Sheryl. Thank you so much for all the support Changes offers to family members. Keep up the amazing, life-changing work. We absolutely salute you!

Facebook Reviews★★★★★

I am now 2 years, 10 months and 19 days clean and sober, thanks to Changes rehab. Some of the main points I was suggested to do were to play the movie through and live life for today.

Facebook Reviews★★★★★

Compassionate. Understanding. Respectful. Motivational. Professional medical and counselling care. Complete education about addiction and the solution. Best family support system in South Africa!.

Facebook Reviews★★★★★

Filled with love and rules, Changes will get you on the straight and narrow and help you find the real you. The structure and support they provide are truly life-changing, I am a very different person today.

Google Reviews★★★★★

I have the utmost respect and gratitude for Changes and the entire team, from Sheryl all the way to Howard the cook and David the guard. It works if you work it. Thank you Changes team.

Facebook Reviews★★★★★

I was fortunate to be a patient at Changes for 90 days. I did treatment at the primary and secondary facility and it really changed my life! I am forever grateful for the help I received.

Facebook Reviews★★★★★

Thank you for all the help on my recovery. It really makes a huge difference in my life. Changes has provided me with everything I need to navigate my new, sober life and actually live again.

Google Reviews★★★★★

I cannot thank Changes enough for all the support, help and encouragement they have given my son. From primary to secondary to the halfway house, he has been treated with respect and care throughout.

Facebook Reviews★★★★★

Research shows that 23% of people with any type of personality disorder have an addiction. Moreover, depending on the study, between 34 and 70% of people treated for addiction also have a personality disorder.

Using drugs and alcohol to deal with the pain or problems related to having a personality disorder is common. Drugs or alcohol do not cause personality disorders but people with a personality disorder have been found to be more likely to abuse drugs and alcohol – and, as a result, are more likely to eventually develop an addiction.

Borderline personality disorder and antisocial personality disorder are the two most commonly diagnosed personality disorders in people with substance abuse problems.

The more severe the addiction, the more likely it is that there is a co-occurring personality disorder.

According to a study published in 2012, people with a dual diagnosis of substance use disorder and a personality disorder tend to:

  • Be younger when they enter inpatient treatment
  • Have used more illicit drugs
  • Be more likely to also have anxiety disorders and depressive symptoms
  • Have less engagement in work or school

This research underscores the need for the diagnosis and treatment of co-occurring personality disorders in people with substance problems in order to prevent tragic and damaging outcomes.

Treating addiction and personality disorders

Having a personality disorder is related to lower rates of treatment success for addiction. But the chances of achieving long-term sobriety increase if both the personality disorder and the addiction are treated simultaneously.

Treatment for personality disorders is notoriously difficult (but by no means impossible) as there are no specific drug-based interventions for these conditions. However, the related symptoms experienced as a result of a personality disorder are often treated with medication, for example depression or anxiety.

Therapeutic interventions that have been successful in the treatment of personality disorders include cognitive behavioural therapy and dialectical behaviour therapy (DBT). DBT was specifically developed for the treatment of borderline personality disorder.

In order for personality disorders to be correctly diagnosed and treated in addiction rehabilitation centres, there should always be a psychiatrist (who is experienced in dual diagnosis) available to assess and treat clients. Experienced psychologists should also be a part of the treatment team so that clients are appropriately treated for both their addiction and any co-occurring personality disorders to give them the best chance of a successful recovery.

Conclusion

We’ve explained the link between having a personality disorder and developing a substance abuse problem – and why this link exists. Finally, we’ve highlighted why it is critically important to treat addiction and personality disorders simultaneously so that clients have a better chance of getting clean and sober in the long term.

Are you looking for addiction treatment that pays special attention to dual diagnosis? Contact us today.

Do you want to learn more about dual diagnosis? Read:

Dr. Thea van der Merwe is a Resident Psychiatrist at Changes Rehab in JHB

Dr. Thea van der MerweRead Bio

Resident Psychiatrist

Dedicated to holistic mental health care.

Scroll to top