You walk into a room and the reason you came in has gone. You lose a word halfway through a sentence in a meeting you've run a hundred times. The to-do list that used to keep you upright now reads like a stranger's handwriting. And somewhere around 2am, you start typing the question into your phone: is this ADHD, or is this perimenopause?
It's one of the most common questions I hear from women in their forties and fifties, diagnosed or wondering. It's also a question with a frustrating answer, because for many women it isn't either/or. It's both.
Why the question is so hard to answer
ADHD and perimenopause share a surprising amount of territory. Brain fog. Forgetfulness. Losing your train of thought. Overwhelm that arrives out of nowhere. Irritability and emotional swings that feel bigger than the moment. Poor sleep that makes everything else harder.
Look at a symptom list for either one and you'll find most of the other. That's why so many women bounce between explanations (stress, burnout, anxiety, "just getting older") before anyone puts the pieces together.
There's a timing problem too. Women are routinely diagnosed with ADHD later than men. A Swedish register study of more than 85,000 people with ADHD found that females were diagnosed around four years later than males on average, and carried a heavier load of other psychiatric diagnoses before anyone named the ADHD (Skoglund et al., Journal of Child Psychology and Psychiatry). Plenty of women now in midlife were never assessed at all. So the first time they consider ADHD often lands in the same season their hormones start shifting.
What perimenopause does to an ADHD brain
Here's the short version of the science. Oestrogen supports dopamine, the brain chemical most closely linked to ADHD. Dopamine helps with focus, motivation, working memory and emotional regulation. During perimenopause, oestrogen doesn't decline in a tidy line. It rises and falls unpredictably, sometimes week to week, before settling lower after menopause.
For a brain that already runs on less reliable dopamine signalling, that's a big change in operating conditions. The research is young, but a pattern is emerging. A population-based study in European Psychiatry found that 54.2% of women with a self-reported ADHD diagnosis had severe perimenopausal symptoms, compared with 30.1% of women without ADHD. The gap was widest at ages 35 to 39, which the researchers read as a sign that perimenopause can begin up to ten years earlier for women with ADHD (Jakobsdóttir Smári et al., 2025).
Not every study agrees on the details. Researchers at King's College London surveyed women with and without an ADHD diagnosis and found no group-level difference in menopausal complaints. What they did find was that the more ADHD symptoms a woman had, diagnosed or not, the more menopausal complaints she reported. They also raised the possibility that women with ADHD attribute their symptoms differently (Chapman et al., Journal of Attention Disorders, 2025).
That last point matters. A woman with a diagnosis can put a hormonal symptom down to her ADHD. A woman without one can put lifelong ADHD down to her hormones. The confusion runs both ways.
Perimenopause doesn't cause ADHD
ADHD is a neurodevelopmental condition. It doesn't begin at 45. What perimenopause can do is remove what was hiding it.
Most women I work with built extraordinary systems long before they had a name for why they needed them. Lists on lists. Over-preparing for every meeting. Working late to catch up on what slipped during the day. Leaning on a calm partner or a brilliant assistant. Running on adrenaline and deadlines. An international expert consensus statement on females with ADHD describes how girls and women often compensate and mask in ways that delay recognition (Young et al., BMC Psychiatry, 2020).
Those systems worked. That's the part that gets lost. They were evidence of resourcefulness, not failure. Then the hormonal conditions they were built for started to change, and the effort needed to keep them running kept climbing.
The scaffolding stopped holding. Your brain didn't stop working.
“Perimenopause doesn’t cause ADHD. For many women, it removes what was hiding it.”
The clue is in your history, not your symptoms
Because the symptoms overlap so heavily, the most useful information usually sits in your past rather than your present. That's also what clinicians look for in an ADHD assessment: a thorough history of how you've functioned from childhood onwards.
None of what follows is a diagnostic test. It's a way to gather your own evidence before a conversation with a professional. A few questions worth sitting with:
Has some version of this always been there? Not the intensity, the pattern. Were you the bright child who "could try harder"? Were school reports full of daydreaming, chattiness or unfinished work?
What did it cost you to cope? If holding it together has always taken far more effort than it seemed to take everyone else, write that down.
What were your systems, and when did they start failing? Note what used to work and roughly when it stopped.
Does it shift with your cycle? Many women notice focus and mood changing across the month. A few months of tracking gives you and your clinician real data.
Does anyone in your family share these traits? ADHD runs strongly in families, and a child's or parent's diagnosis is often what prompts a woman to look at herself.
If your answer to the first question is "yes, for as long as I can remember", it's worth asking whether perimenopause has turned up the volume on something that's been playing quietly for decades. If everything was steady until your hormones changed, that's useful information too. Either way, you'll walk into your appointment with more than a vague sense that something's wrong.
What to do with the question
You don't have to solve this alone, and you don't have to solve it in one go.
Take your notes to your GP or a menopause specialist and ask about both: perimenopause support and an ADHD assessment. They're separate pathways, and one doesn't cancel out the other. Your clinician is the right person for questions about HRT, ADHD medication or how the two interact. I'll walk through how to talk to your GP about ADHD in perimenopause later in this series.
If you're already diagnosed, the conversation looks a little different. Your existing strategies, and any medication, may need revisiting as your hormones shift. That isn't a setback. It's an update.
Whatever the clinical picture turns out to be, a practical question is waiting on the other side of it: what do I actually do differently on Monday? A diagnosis gives you an explanation. It doesn't rebuild your systems. That's where coaching fits, working alongside your clinical care rather than instead of it. I've written more about why so many women are being diagnosed with ADHD in perimenopause, and why the diagnosis is the start of the work rather than the end of it.
If you're a GP, menopause doctor or other clinician reading this, I've put together a free clinical reference on ADHD and the menopausal transition, with full peer-reviewed references and a clear outline of where coaching sits alongside medical care.
From one late-diagnosed woman to another
I was diagnosed late. I know the particular disorientation of looking back over decades of effort and finally understanding what it was compensating for. It's a lot to take in. It's also not the end of the story, because a late diagnosis isn't a late start.
If you'd like to see how I support women through this stage, you'll find more on my Women in Midlife coaching page.
Ready to build systems for the brain you have now? Book a free 50-minute discovery session. We'll look at what's stopped holding, what's still working, and whether coaching is the right next step for you, diagnosed or wondering.
Angella Newell is an ADDCA-trained ADHD coach, founder of Winning with ADHD, and a late-diagnosed adult. She works virtually with late-diagnosed adults across the UK, Australia, Portugal, and globally. ADDCA is accredited by both the ICF and PAAC.