Dopamine and the addicted brain: why addiction takes hold

When someone tells us they cannot give up a substance or a behaviour that is hurting them, it is common to hear phrases like "they just lack willpower" or "if they really wanted to, they would stop." Yet the science that studies the brain tells a very different, and far more human, story. Addiction is not a character flaw or a sign of weakness: it is a profound change in the way one of the oldest and most powerful systems in our brain works, the reward system. Understanding what happens in there not only helps us look with more compassion at those who suffer it, but also opens the door to hope, because a brain that has changed can change again.

At Reconectar, our centre for the treatment of addiction and codependency in Las Palmas de Gran Canaria, we accompany people every day who feel trapped and who often blame themselves for being unable to stop. That is why we want to explain, in a simple way and without unnecessary jargon, what dopamine is, how the brain gets "hijacked" and, above all, why recovery is possible. Knowing what goes on inside us is the first step towards no longer fighting blindly and beginning to understand ourselves.

What dopamine is and what the reward system is for

Dopamine is a molecule that our neurons use to communicate with one another. It is often called "the pleasure hormone," but that label falls short and is even misleading. Dopamine has to do, above all, with motivation, with the urge to go after something, with the drive that pushes us to repeat whatever has been good for us. It is the signal the brain sends when something important for our survival or wellbeing has just happened or is about to happen.

The so-called reward system is a set of brain structures that work together to fulfil a mission that evolution took millions of years to fine-tune: to help us survive. When we eat while hungry, when we drink water when thirsty, when we connect with the people we love or when we learn something new, the brain releases dopamine. That small chemical reward leaves a mark: "this was good, remember it, do it again." Thanks to this mechanism we have sought food, formed bonds and cared for our young throughout history. In its natural form, the reward system is a wonderful ally.

How substances and certain behaviours "hijack" the brain

The problem appears when something activates this system in an artificial and disproportionate way. Drugs, alcohol, gambling, pornography, certain relational dynamics or the compulsive use of screens can trigger releases of dopamine far greater than those produced by any natural reward. Where a good meal or a hug generate a moderate rise, some substances set off enormous peaks, much more intense and rapid.

The brain is not built for those amounts. Faced with such a signal, it interprets that something hugely important has just happened, something that must be repeated at all costs. And so it becomes engraved, with a force that the rest of everyday life can hardly match. This is what we mean when we say that addiction "hijacks" the reward system: it takes a mechanism designed to help us live and puts it at the service of a substance or a behaviour that is, in fact, harming us. The brain starts to treat that as if it were as necessary as eating or drinking.

Tolerance: why more and more is needed each time

When the brain receives those exaggerated dopamine peaks over and over again, it tries to protect itself. It is a very intelligent system that seeks balance, and faced with so much excess it reacts by reducing its own sensitivity. It is like turning down the volume of a speaker that is playing too loud: the brain decreases the number of available receptors and produces less dopamine on its own.

The consequence is what we call tolerance. The same amount of a substance or the same behaviour no longer produce the effect they used to. To feel what they felt at the start, the person needs more: a higher dose, greater frequency, more intensity. It is a cruel trap, because the more one consumes to recover that sensation, the more the system shuts down, and the more it shuts down, the more one needs. The person is no longer chasing the pleasure of the beginning; often they are simply chasing an end to feeling bad.

When everyday life stops giving pleasure: anhedonia

This is one of the most painful and least understood aspects of addiction. Because the reward system has adapted to those gigantic peaks, the normal rewards of life stop being enough to activate it. A walk along the beach, a conversation with a friend, a meal that used to be enjoyed, an achievement at work: all of it loses its shine. The brain, used to enormous stimuli, barely responds any more to the small pleasures of each day.

We call that inability to enjoy what once brought joy anhedonia. It is one of the reasons why many people describe addiction as a life in black and white, in which nothing is exciting except the substance or the problem behaviour. It also explains why the first weeks without using can be so hard: the brain has not yet recovered its ability to enjoy simple things. It is important to know that this state is not permanent; with time and the right support, the capacity to feel pleasure returns.

The prefrontal cortex: why addiction is not a lack of willpower

Here we reach a fundamental point. In the front part of the brain, right behind the forehead, lies the prefrontal cortex. It is the region in charge of the most human thing we have: thinking about consequences, planning for the future, making sensible decisions and, above all, putting the brakes on impulses. It is, so to speak, the driver who decides when to hit the brake even though a more primitive part of the brain is shouting that it wants to keep going.

Addiction damages precisely that braking capacity. The changes it causes weaken the prefrontal cortex and, at the same time, reinforce the more impulsive areas of the brain, the ones that demand the reward urgently. The result is devastating: at the moment of craving, the brake works poorly and the accelerator is floored. That is why saying "you just need more willpower" is like asking someone to run fast on an injured leg. It is not that they do not want to; it is that the instrument through which willpower is exercised is impaired. Understanding this frees people from an enormous burden of guilt and places addiction where it belongs: as a health problem that can be treated, not as a moral failure.

Craving, memory and triggers

Our brain is an extraordinary machine for learning and making associations. During addiction, it memorises not only the substance or the behaviour, but everything around them: a place, a time of day, certain people, a specific emotion, a song, a smell. Those cues are recorded as warnings that announce the reward.

Later on, even if the person has not used in a long time, any of those triggers can powerfully reactivate the desire. That intense and sometimes sudden wave of the urge to use is what we call craving. It is not a whim or a sign that recovery is going badly: it is the brain's memory making itself felt. Understanding where craving comes from and learning to identify one's own triggers is an essential part of therapeutic work, because it allows us to anticipate and respond differently instead of feeling at the mercy of an incomprehensible impulse.

The good news: neuroplasticity

So far we have described how an addicted brain is transformed, and it might seem a discouraging picture. But there is a hopeful piece of news that changes everything: the brain is not a fixed, unchangeable structure. It has an astonishing capacity called neuroplasticity, which is precisely its ability to reorganise itself, create new connections and modify existing ones throughout life.

The same plasticity that allowed addiction to take hold is what makes recovery possible. When a person stops feeding the problematic circuit and begins to build new habits, new routines and new sources of wellbeing, the brain responds. Little by little it recovers receptors, returns to producing dopamine more normally, the prefrontal cortex grows stronger and simple things bring pleasure again. It does not happen overnight, and the process calls for patience and perseverance, but it does happen. The brain that changed can change again, this time in favour of health.

How therapy helps and what Reconectar's approach is

Therapy is not a lecture about willpower, but work that accompanies and enables those brain changes. In the therapeutic process, people learn to recognise triggers, to handle craving without giving in to it, to rebuild everyday life with activities that restore meaning and pleasure, and to understand the emotions and relationships that are often at the root of their distress. All of this helps the brain weave new pathways and weaken the old ones.

At Reconectar we work with an open method, without residential admission, because we believe that recovery takes hold when people learn to live differently within their own environment, not isolated from it. Our main features are:

• Direct care from the therapists, with no intermediaries, offering close and personal support.
• The option to attend in person in Las Palmas de Gran Canaria or to follow the process by video call, so that distance or scheduling are not an obstacle.
• A confidential space, where you can speak freely and without fear of judgement.
• An approach that understands addiction and codependency as health problems to be addressed with knowledge, respect and hope.

If you have reached this point and something you have read resonates with what is happening to you or to someone you love, allow yourself a kind thought: it is not that you lack willpower, but that your brain has learned something it can also unlearn. Recovery is not only possible, it is the most common outcome when there is proper support and time. At Reconectar we would be glad to listen to you and to help you take the first step, calmly and without pressure. If you wish, you can get in touch with us and we can talk; sometimes a single conversation is the beginning of a different path.