Hardwired for Dopamine: What Addiction Actually Does to the Brain
- Alexandra Bless
- 12 minutes ago
- 4 min read
What Triggers Addiction?
Addiction manifests in many shapes and forms: drugs, alcohol, food, gambling, exercise, or even scrolling on social media. But what do they all have in common?
Humans inherently seek pleasurable experiences, so it is natural to engage in behaviors that are enjoyable. Pleasure arises through the release of dopamine, a neurotransmitter that regulates the “reward center” of the brain. This reward system is evolutionarily valuable, as it reinforces behaviors that aid in survival. For instance, when eating, dopamine is released and results in a sense of satisfaction, which motivates you to eat again later.
However, too much of a good thing can be detrimental. When a person is experiencing addiction to a substance or behavior, their reward pathways get flooded with dopamine at much higher levels than they would with a natural reward such as food, creating a dopamine imbalance. As a result, everyday activities that would typically be enjoyable pale in comparison to the behavior that releases excess dopamine because the brain is now chemically rewired to expect this disproportionate release of dopamine as a baseline for everyday functionality.
Although pleasurable at first, repeated surges in dopamine over time end up having the opposite effect. Dopamine receptors, or the molecules that detect dopamine, become less sensitive over time, making it harder to feel pleasure from the stimulus. Consequently, those experiencing addiction have to increase their consumption levels of the stimulus to feel the same way they initially did.
Stages of Addiction
Addiction, particularly for substances such as drugs or alcohol, typically progresses in the following stages:
Initial use: Using a substance one time won’t necessarily result in the development of an addiction, but repeated use will dictate whether the behavior becomes pathological.
Experimentation: Repeated use beyond the first time, often socially, reinforces and normalizes the behavior in a group setting. Repeated experimentation can lead to subtle increases in dependency and heighten the risk of addictive behavior later on. Recognizing and confronting the behavior in this phase is crucial for early intervention before the addiction progresses.
Regular use: Regular use alone or outside of social settings marks the transition into addictive tendencies. The habit is now normalized both socially and independently, and individuals might start engaging in risk taking behaviors, such as driving under the influence, or using the substance to manage anxiety or depression.
Abuse: Regular use quickly turns into abuse when the substance is used more frequently or in greater quantities. As a result, the substance starts becoming a higher priority in the person’s life, and relationships can become strained, job performance may decline, and changes in behavior are recognizable to others. This is the point when the brain begins to chemically change and rely on the substance for dopamine release.
Dependency: Due to increases in tolerance, the brain is now fully chemically dependent on the substance and needs greater quantities of it to feel the same effect. Rather than the individual making an active choice to use the substance, it has become a necessity for daily functioning, and stopping can result in withdrawals that are either highly uncomfortable or even life-threatening. Dependency changes how the brain and body react to the substance and marks the highest level of addiction.
Recovery: Addiction can be overcome through recovery with the help of medical professionals. To successfully recover, people typically undergo a combination of group and individual therapy to develop tools to manage the chronic nature of their condition and reduce the chances of relapse.
Relapse: Despite intervention efforts, it’s not uncommon to relapse during the recovery process. Relapse occurs between 40 and 60% of the time, but despite these chances, it is still possible to resume recovery efforts and successfully overcome the addiction cycle for good.
How the Brain Changes During Recovery
The brain is hardwired with neural pathways dedicated to dopamine release, and when addictive stimuli are readily available for consumption, these pleasure pathways can become overused. However, it is possible to overcome an addiction and return to original baseline levels of dopamine production as a result of neuroplasticity, the brain’s ability to retrain itself and adapt to different habits and behaviors by forming new neural connections.
One of the most common ways to retrain the brain during recovery is through Cognitive Behavioral Therapy, or CBT. This therapeutic method helps people modify their habits by recognizing negative thought patterns and behaviors and learning how to reframe these thoughts, leading to healthier coping strategies.
Although the brain can be trained in negative ways to enforce addictive behaviors, this doesn’t have to be permanent. Thanks to neuroplasticity, the brain can also be retrained in positive ways to overcome addiction, freeing individuals from chemical dependencies and ultimately bringing joy back into everyday life.
References
The Addiction Cycle: What Are The Stages of Addiction? (2024, December 17). American Addiction Centers. https://americanaddictioncenters.org/the-addiction-cycle
Drugs, Brains, and Behavior: The Science of Addiction: Drugs and the Brain | NIDA. (2020, July 6). National Institute on Drug Abuse. https://nida.nih.gov/publications/drugs-brains-behavior-science-addiction/drugs-brain
How an Addicted Brain Works | News. (2022, May 25). Yale Medicine. https://www.yalemedicine.org/news/how-an-addicted-brain-works
Johnson, Gordon. (2020, June 23). Brain prescription medication graphic. [Image]. Pixabay. https://pixabay.com/users/gdj-1086657/
Mavrikaki, M. (2020, June 26). Brain plasticity in drug addiction: Burden and benefit. Harvard Health. https://www.health.harvard.edu/blog/brain-plasticity-in-drug-addiction-burden-and-benefit-2020062620479
Understanding the stages of drug and alcohol addiction. (2025, October 14). Main Line Health. https://www.mainlinehealth.org/blog/what-are-the-stages-of-drug-and-alcohol-addiction
Williams, S. (2025, August 5). Why our brains are wired for addiction: What the science says. Stanford Medicine.
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