What ADHD medication doesn't fix

Forgetful. Foggy by 2pm. Wired at night but can't focus during the day. Starting five things and finishing none of them.

Everyone's telling you it's ADHD.

For some people, that's exactly right. For others, it's part of the picture. And for a lot of people, it's the label that gets reached for first, because once it's named, everything else stops getting questioned.

A patient of mine had already been told this. She'd read about ADHD, recognised herself in every symptom, and was fairly convinced that was the whole answer. Trouble focusing. Forgetting things mid-sentence. Crashing hard every afternoon. It fit.

But when we actually looked, her ferritin was sitting low. Her thyroid had never had a full panel run, just the standard single marker. And she was skipping breakfast most days, running on coffee until lunch, then wondering why she couldn't think straight by 2pm.

None of that ruled out ADHD. But none of it had been looked at either, because once the label landed, nobody kept asking.

Trouble focusing. Forgetfulness. Procrastination. Restlessness. Mental fatigue. Afternoon crashes. That constant feeling of having 37 tabs open in your brain.

For some people, these patterns genuinely are ADHD.

But difficulty concentrating doesn't automatically tell us why you're struggling to concentrate.

And even if you do have ADHD, it doesn't suddenly make the rest of your physiology irrelevant.

Think of it like an engine

Imagine your brain as a high-performance engine, one that needs clean fuel, steady electricity, and no grit in the gears. The racing thoughts, the inability to stay on one track, the sudden crashes, that's the engine sputtering.

Medication is often "here's more spark." And for a lot of people, that genuinely helps. But there's a separate, useful question underneath it: why is the engine sputtering in the first place?

Fuel quality matters. Mostly sugar and ultra-processed food sends blood sugar up and down like a roller coaster, and focus collapses right along with it. A lot of people with ADHD are also running low on the actual building blocks the brain needs, iron to help make dopamine, magnesium to calm an over-firing nervous system, zinc, and omega-3 fats that keep brain cell membranes working properly. Without those, the spark plugs just don't fire cleanly, medicated or not.

Medication can still be a useful tool. But it works on a better-running engine, not instead of one.

So before assuming every symptom is ADHD, or alongside whatever treatment you're already using, these are some of the things I'd work on.

1. Start with sleep

If someone tells me they can't concentrate, one of my first questions is: how are you actually sleeping?

Not just how many hours. Are you waking through the night? Do you wake refreshed? Do you snore? Are you lying in bed scrolling until midnight and then wondering why your brain isn't cooperating the next morning?

Poor sleep affects attention, working memory, emotional regulation and executive function. ADHD and sleep problems absolutely coexist. Improving sleep isn't about proving you don't have ADHD, it's about removing something that could be making everything harder.

2. Stop running your brain on coffee until midday

Coffee for breakfast. Forget to eat. Finally eat something at 2pm. Crash at 3pm. Have another coffee. Then wonder why concentration has disappeared.

You don't need to obsessively monitor your blood glucose. Start with the basics: eat regularly, get enough protein, include fibre-rich whole foods, eat carbohydrates and healthy fats. If you become foggy, irritable and unable to concentrate every afternoon after barely eating all day, that's useful information, a quiet blood sugar crash can sabotage focus even in someone who isn't diabetic.

3. Look at your bloods

This is where my clinical brain gets particularly interested.

Not because a blood test can diagnose ADHD. It can't.

But if someone is exhausted, foggy, struggling to concentrate, freezing all the time, experiencing restless legs or finding exercise unusually difficult, I don't automatically put all of that under the ADHD umbrella.

Iron is a good example of why. Dopamine, the chemical that helps you lock onto a task and ignore distractions, needs iron to be made. If ferritin is low, even without full-blown anaemia, that process slows down, and the result can look identical to classic ADHD: brain fog, restlessness, poor focus. This is exactly what showed up with the patient above.

None of these "cure" ADHD, and the evidence for any single one is modest on its own. But the ADHD label describes a pattern of symptoms, and some of those symptoms can be genuinely amplified by missing raw materials.

Depending on symptoms and history, I want to look at: FBC + iron studies/ferritin, B12 + folate, thyroid function, vitamin D, magnesium and zinc where appropriate.

And I don't just want to know whether the lab flagged something red. I want the actual numbers. Previous results. The trend. The markers around them. And whether any of it makes sense alongside what that person is experiencing.

One marker is data. The pattern gives us context.

4. Move your body

This is probably one of the most under-utilised tools we have.

Regular physical activity can support attention, executive function, mood and sleep, including in people with ADHD. It doesn't need to mean smashing yourself in the gym six days a week.

Walk. Lift. Run. Swim. Ride. Play sport. Even getting up and moving when you've been staring unsuccessfully at the same paragraph for 45 minutes can be useful.

Sometimes forcing yourself to concentrate harder isn't the answer. Change your state first. Then come back to the task.

5. Look at the environment you're asking your brain to concentrate in

Your phone buzzes. Email comes through. Instagram notification. Someone messages you. You have 14 browser tabs open. A podcast is playing. You're trying to finish a report.

And then: "why can't I focus?"

ADHD or not, we're asking our brains to process an extraordinary amount of information. Phone in another room. Notifications off. One task open. Twenty or thirty minutes of uninterrupted work.

You don't need more discipline for every problem. Sometimes you need less input.

6. Give your nervous system somewhere to come down

If you're constantly moving between work, kids, training, emails, finances, social media and everything else life throws at you, your brain rarely gets a genuine period of recovery. Scrolling on the couch isn't necessarily recovery.

Go outside. Walk without your phone. Eat a meal without a screen. Sit somewhere quiet. Get morning light. Go to bed earlier. Do absolutely nothing for ten minutes.

They're not exciting interventions. Nobody can sell you a $90 bottle of them. That doesn't make them irrelevant.

7. Don't ignore your gut

The gut-brain conversation is interesting, novel evidence suggests that people with ADHD have lower levels of beneficial gut bacteria.

Larger analyses have found meaningfully higher rates of gut issues in people with ADHD, constipation especially stands out. That doesn't mean "take this probiotic and cure your ADHD."

But if someone has difficulty concentrating and they're chronically bloated, constipated, or dealing with ongoing abdominal discomfort, I'm not ignoring those symptoms just because ADHD is also present. This shows up in kids too, some parents notice real shifts in focus or behaviour around certain foods, which is worth taking seriously rather than dismissing as coincidence, even though it doesn't play out the same way for everyone.

Start with the foundations. Adequate fibre if tolerated. A diverse range of foods. Mostly wholefoods. Movement. Sleep. If digestive symptoms persist, investigate them properly.

And what about medication?

I don't think this conversation needs to become medication vs natural health. That's far too simplistic.

For some people with ADHD, medication makes a meaningful difference to daily functioning. Some want to work on these foundations before deciding whether medication is right for them. Others use medication and work on these things alongside it. All three can be reasonable conversations to have with the appropriate clinician.

What I don't love is when someone has a diagnosis and suddenly every symptom gets attributed to it.

You're exhausted? ADHD. Can't concentrate? ADHD. Poor sleep? ADHD. Brain fog? ADHD.

Maybe. But I still want to know why you're exhausted. I still want to know why you're waking unrefreshed. I still want to know why your iron keeps dropping. I still want to know why you're crashing every afternoon. I still want to know why your gut isn't functioning properly.

Because you can have ADHD and something else going on. OR that something else going on may be contributing to your ADHD-like symptoms.

Then make informed decisions about ADHD assessment and treatment with the appropriate healthcare professional.

The point isn't to prove that your symptoms aren't ADHD. It's to make sure we don't find one explanation and stop asking questions too early.

ADHD may be one piece of the picture. But there's still a whole body attached to the brain.

This article is general information, not personal medical advice.