Chasing the High: ADHD, Impulsivity, and the Hidden Cost of Risk-Taking

Impulsivity is often misunderstood when it comes to ADHD. People usually think it just means interrupting or making quick decisions, but for many of us, it goes much deeper. It can affect our habits, relationships, finances, and even the course of our lives.

Impulsivity isn’t just about being reckless. It’s really about chasing what our brains crave: stimulation, reward, and relief. This constant search for dopamine is something many adults with ADHD experience, often before they even know ADHD is the cause. If you see yourself in these habits, you’re not alone, and there’s no shame in it. In my twenties, before I knew I had ADHD, impulsivity showed up in ways that felt exciting but also harmful. Alcohol was a quick way to feel good and i was the fucken life of the party, but no one could see the crippling anxiety behind closed doors. Spending money gave me a short burst of control or excitement, until i had to live of £20 to last a week (Koka noodles was great for this, if you know, you know). Taking risks, like speeding, using substances, or having sex, can feel like a way to escape the constant restlessness and racing thoughts for many people with ADHD.

The Dopamine Deficit and the Need for “More”

At the core of ADHD is a difference in how the brain regulates dopamine, the neurotransmitter responsible for motivation, pleasure, and reward. For people with ADHD, dopamine levels tend to be lower or less stable; it's like our brain has a leaky tap. This creates a constant internal sense of under stimulation, that itchy, restless feeling that something is missing. Impulsivity, in this context, becomes less about "poor choices" and more about self-regulation. The brain is constantly scanning for ways to top up the tank, and let's be honest, the quickest ways to do that are often the most intense through things like alcohol, drugs, risky behaviour, or anything that offers us that immediate gratification.

Alcohol and the Illusion of Relief

For many of us, alcohol lowers inhibitions, quiets the fifty different tabs open in your brain, and creates a temporary sense of calm. It can feel like the mental noise in our heads has finally been turned down. But for the ADHD brain, alcohol is a bit of a double agent. We don't just drink to enjoy the taste or for the vibe; we drink to feel "normal." From my own experience, I wasn't just socialising; I was chasing that dopamine spike. One drink often led to six because I wanted to sustain that feeling of being "switched on" and relaxed at the same time. The danger is how quickly that control slips. When your brakes are already dodgy, alcohol doesn't just loosen them; it cuts the lines entirely. That's why now I don't really drink anymore unless it's because I want to for an occasion, not because I want dopamine or to mask anymore. It took time to realise there are healthier ways to manage that restless feeling or social anxiety. They might not have the instant kick of a drink, but over time, they leave me feeling a lot more in control.

When the Brakes Fail: Alcohol, Sex, and Risk

This is the heavy stuff we don't always talk about. Alcohol doesn’t just increase impulsivity; it can amplify it to a dangerous level. When you combine an ADHD brain’s drive for immediate reward with the inhibitory loss from a few drinks, the "future" completely disappears. You’re living in the Permanent Now.

One of the biggest areas affected is sexual behavior. When your brain is craving dopamine and your self-control is lowered by alcohol, decisions about sex become less about real choice and more about getting that quick feeling of connection or pleasure. This can lead to:

• Unplanned sexual encounters with people you wouldn't usually look twice at (we’ve all been there)

• Reduced use of protection: The hassle of finding a condom feels like an unbearable interruption to the dopamine flow.

• Unplanned pregnancies and STIs: The ADHD brain prioritises the 10-minute (if you're lucky) reward over the consequence.

  
  

It’s important to be clear: This isn’t a moral failure. You are not a "slut." It’s about how your brain works. If you’ve ever woken up with "The Beer Fear" or a lot of regret, remember your brain was struggling to access the part that weighs risks.

Sex as an Impulsive Behaviour

Even without alcohol, sex can be an impulsive way to feel better. It’s one of the strongest natural dopamine boosts. For a brain that craves stimulation, the excitement of a new partner or a one-night stand isn’t just fun—it can feel like a quick fix. This can lead to patterns where you use sex to manage your mood or escape the boredom that comes with ADHD. There’s also an emotional side, where you might look for validation or a quick boost to your self-esteem through intimacy. It’s a short-term solution for a deeper problem. Rejection Sensitivity Dysphoria can also play a role, making you use sex to feel less alone or less rejected. You can read more about this in my other blog post: /post/the-are-you-fuming-with-me-feeling-a-deep-dive-into-rejection-sensitive-dysphoria-rsd

The "Add to Cart" Reflex: Financial Fallout

Money is another area where the ADHD Tax can be tough. Spending gives a quick dopamine boost, whether it’s the thrill of a new hobby or that sudden feeling of "I need this!" For me, this led to a lot of debt when I was younger. Things I bought felt essential at the time, but often ended up forgotten in a drawer soon after.

Whether it’s clothes, gadgets, or just buying everyone a round at the bar because you're feeling bubbly, impulsive spending is a classic ADHD trap. It’s the struggle to delay gratification. We want the shiny thing now, and we'll deal with the bank stuff later (or, more likely, ignore it). This can hit really hard when we use impulsive spending as a form of self-regulation when we are feeling really shit about ourselves. Spending often looks like:

• The Spark: You see an item that promises a new hobby, a better look, or a solved problem.

• The Hyperfocus: You spend hours researching the best version of this item. Online shopping for hours, often at bedtime too.

• The Purchase: The click or add to basket provides an immediate rush of euphoria.

• The Crash: When the parcel arrives, the dopamine is gone. You’re left with "Buyer's Remorse" and a mounting credit card bill.

  
  

When you’re undiagnosed, you don't have the coping mechanisms to realise that the "need" for the item is actually just a "need" for a chemical spike. This leads to the "ADHD Tax", the money lost to interest rates, unused subscriptions, and impulse buys.

Speeding, Substances, and Binge Eating

The search for stimulation goes beyond spending. Maybe you’ve driven over the speed limit just because the focus makes you feel alive. That’s sensation seeking. It’s also why some people try drugs or end up eating a whole bag of M&Ms late at night. Binge eating is often the easiest way to get a quick dopamine boost. It’s usually not about hunger, but about handling stress or boredom when your brain feels restless.

Awareness Without the Shame Spiral

The pattern here is acting first and thinking later. It’s not that we don’t understand the risks; it’s just that in the moment, the part of the brain that weighs risks isn’t working.  If you’re reading this and thinking, "That’s exactly me," the most important thing is to let go of shame. Shame is a low-dopamine feeling that often leads to you, guess what, more impulsive behaviour to feel better.

• The 24-Hour Rule: For spending or big decisions, park it for a day. If you still want it when the dopamine has cooled off, then look at it.

• Externalise your Safety: Use long-term contraception if sex is an impulsive area for you. Use "round-up" savings apps so you can't spend every penny. Don't get an overdraft if you know it's a dangerous risk.

• Educate yourself: Once you understand the engine, you can finally start to steer the car properly. Whether that's getting a diagnosis, starting medication, reading about ADHD, or being in therapy. The more you know, the more you can be aware of your triggers, traits and spirals.