If you have ADHD, “just go to bed earlier” is probably the most useless advice you’ve ever been given. You might lie there wide awake for an hour, mind racing through half-finished projects and conversations from three days ago, then finally drift off just as it’s time to get up — only to feel wired again the moment your alarm goes off. If this sounds familiar, you are far from alone, and there is a reason it keeps happening.
A growing body of research shows that insomnia is one of the most common — and most overlooked — companions of adult ADHD. The good news is that it is also one of the most treatable, once you understand why a standard “switch off your phone and have a warm bath” approach rarely works for an ADHD brain.
Why ADHD and insomnia go together
ADHD and insomnia share more than a passing connection. Several overlapping mechanisms make falling asleep, and staying asleep, genuinely harder:
- Cognitive arousal at bedtime. The same difficulty “switching off” that shows up during the day — jumping between thoughts, replaying conversations, planning tomorrow — intensifies at night, when there are fewer distractions to compete with it.
- A delayed body clock. Many adults with ADHD have a naturally later circadian rhythm, so their body doesn’t feel ready for sleep until well past a “normal” bedtime, even when they have to be up early the next day.
- Irregular routines. Inconsistent wake times, late-night hyperfocus sessions, and using screens to wind down (because they’re stimulating enough to hold attention) all chip away at the body’s sleep signals.
- Medication timing. Stimulant medication, if taken too late in the day, can make it harder to fall asleep — something worth raising with your GP or prescriber rather than adjusting alone.
- Overlapping conditions. Anxiety and low mood are common alongside ADHD, and both are well known to fuel insomnia in their own right.
What the research actually shows
This isn’t just a clinical impression — the data backs it up. A 2025 study in the Journal of Attention Disorders found that around 60% of adults with ADHD reported some form of sleep disorder, with insomnia being the most frequently reported complaint. A separate 2025 analysis from the Netherlands Sleep Registry, covering more than 1,300 adults, found that insomnia severity was a significant driver of lower quality of life in people with ADHD traits — and the researchers specifically pointed to Cognitive Behavioural Therapy for Insomnia (CBT-I) and sleep restriction as promising ways to improve it.
A 2025 study in Frontiers in Psychiatry added further detail, finding that adults with ADHD showed higher “sleep reactivity” — meaning their sleep is more easily disrupted by stress, caffeine, or an unpredictable day — alongside higher insomnia severity scores than people without ADHD. None of this means insomnia is “just part of having ADHD” that you have to live with. It means the two conditions interact, and treating the sleep problem directly tends to help both.
Why generic sleep advice often falls flat
Most sleep hygiene checklists assume a brain that can wind down on command: dim the lights, read a book, feel sleepy. For many people with ADHD, a book isn’t engaging enough to hold attention away from racing thoughts, and “just relaxing” can feel like being asked to sit in a quiet room with your thoughts turned up to full volume. That’s why so many people with ADHD try sleep hygiene tips, find they don’t work, and conclude that nothing will help. In reality, the issue usually isn’t the person — it’s that the advice wasn’t designed with an ADHD brain in mind.
How CBT-I treatment works with an ADHD brain
CBT-I remains the most evidence-based insomnia treatment available, including for adults with ADHD, though it typically needs a few practical adjustments:
- Working with your real circadian rhythm, not an idealised one. Rather than forcing an unrealistic early bedtime, treatment starts from your actual sleep pattern and adjusts it gradually, often using consistent morning light exposure to help shift a delayed body clock.
- Building in an external “off switch.” Since willpower alone rarely quietens an ADHD mind, structured wind-down routines, alarms, and environmental cues (like a specific lamp coming on) tend to work better than relying on self-discipline alone.
- Addressing the racing-thoughts problem directly, often with a structured “worry time” or brain-dump technique earlier in the evening, so the mind has already processed the day before you lie down.
- Sleep restriction therapy, which consolidates fragmented sleep into a more efficient window — one of the components researchers specifically flagged as helpful for adults with ADHD and insomnia.
- Tackling the bed-and-screens association, since scrolling in bed is often the path of least resistance for an understimulated ADHD brain at night, even when it actively delays sleep.
You can read more about the mechanics of this approach on our page explaining why CBT-I works, and how it compares with other options on our insomnia treatment without medication guide.
Practical adjustments that genuinely help
Alongside structured treatment, small changes can make a real difference for an ADHD brain at night:
- Externalise the wind-down. A recurring alarm labelled “start winding down” removes the need to notice the time yourself.
- Give your mind something to land on. A notebook by the bed for stray thoughts can stop a single idea from spiralling into an hour of mental activity.
- Keep wake time consistent, even on weekends. A stable wake time anchors the body clock far more effectively than an early bedtime that never actually happens.
- Move stimulating screens out of the last hour before bed. If you need something to do, a low-stimulation audiobook or podcast can bridge the gap without the alerting pull of a phone.
- If you wake in the night, resist the urge to check the time or pick up your phone — our guide on why you wake up in the middle of the night explains what actually helps in that moment.
A note on medication
Some people with ADHD and insomnia are taking stimulant medication, sleep medication, or both. Timing and dosage genuinely matter here, but this isn’t something to adjust on your own. If you suspect your ADHD medication is affecting your sleep, or you’re relying on sleeping pills and want a longer-term alternative, speak to your GP or prescriber before making any changes. CBT-I is designed to work alongside medical care, not instead of medical advice.
Getting started
If racing thoughts, a late body clock, or years of “trying harder” to sleep sound familiar, it’s worth having your sleep properly assessed rather than assuming it’s just another ADHD trait to manage alone. Our complete guide to insomnia and guide to falling asleep faster are good starting points, and a proper CBT-I programme can be adapted specifically around an ADHD brain rather than asking you to force-fit generic advice.
Frequently asked questions
Does ADHD cause insomnia, or does insomnia cause ADHD symptoms?
It works both ways. ADHD traits such as racing thoughts, impulsivity and an irregular body clock can make falling and staying asleep harder, while poor sleep in turn worsens attention, focus and emotional regulation — creating a cycle that keeps both conditions going. Treating the insomnia directly is one of the few ways to break into that cycle.
Is CBT-I safe to use alongside ADHD medication?
Yes, CBT-I is a behavioural, non-drug treatment and is generally safe to use alongside ADHD medication. However, if you think your medication timing or dosage is affecting your sleep, speak to your GP or prescriber rather than changing it yourself.
Why doesn’t standard sleep hygiene advice work for me?
Generic sleep hygiene tips assume a mind that can settle on command. For many people with ADHD, low-stimulation wind-down activities aren’t engaging enough to hold attention away from racing thoughts, so the advice fails not because of a lack of effort, but because it wasn’t designed with an ADHD brain in mind. CBT-I adapted for ADHD builds in more structure and external cues instead.
How common is insomnia in adults with ADHD?
Research published in 2025 found that around 60% of adults with ADHD reported some form of sleep disorder, with insomnia being the most frequently reported type. Studies also link higher insomnia severity in adults with ADHD to lower overall quality of life, underlining why it’s worth treating directly rather than overlooking.
Insomnia isn’t just another ADHD trait to push through — it’s a treatable condition in its own right, and treating it properly tends to make everything else, from focus to mood, a little easier to manage. If racing thoughts and a wired-but-tired brain are keeping you up most nights, start with our free insomnia self-assessment to see where you stand, or get in touch to talk through a treatment plan built around how your brain actually works.