ADD is the older name for what is now called ADHD, and the two do travel with insomnia: in a clinic sample of 252 adults with ADHD, 44.4% met criteria for insomnia disorder, more often in the combined presentation and in people with more severe ADHD. A review describes four ways the two can relate, including ADHD causing sleep problems and sleep problems mimicking ADHD. One study found a delayed body clock in adults with ADHD and sleep-onset insomnia. None of this is a diagnosis in either direction.
ADD is still the name many people use. In current diagnostic language it has been folded into ADHD, which comes in inattentive, hyperactive and combined presentations. The question underneath is the same. Why does a head that will not stop during the day so often refuse to stop at night, and which of the two causes the other?
The short version is that the link is real, the direction is mixed, and it matters which pattern you have, because the fixes differ.
Can ADD cause insomnia? What the studies found
ADHD insomnia is common enough to have its own research stream. A clinic study assessed 252 adults with ADHD (average age 37.6) using structured interviews and sleep questionnaires, and applied DSM-5 criteria for insomnia disorder. Insomnia disorder was found in 44.4%, and it was more common in the combined presentation (64.3%) and in people with more severe ADHD. Mood disorders (42%), anxiety disorders (26.8%) and personality disorders (39.3%) went along with a higher rate of insomnia. Worse quality of life went with it too.
Fadeuilhe C, Daigre C, Richarte V, Grau-López L, Palma-Álvarez RF, Corrales M, Ramos-Quiroga JA. Insomnia Disorder in Adult Attention-Deficit/Hyperactivity Disorder Patients: Clinical, Comorbidity, and Treatment Correlates. Front Psychiatry 2021. PMID 34122179
Two limits belong next to that number. These were patients at a specialist clinic, who are not a sample of everyone with ADHD, and the study looked at one point in time, so it cannot say what came first.
A 2024 study asked a narrower question: why do some adults with ADHD sleep worse than others? It compared 61 adults with ADHD and no other psychiatric or medical illness with 61 matched healthy adults. The ADHD group had higher sleep reactivity (the tendency for stress to trigger insomnia), higher insomnia severity and worse sleep quality. Within the ADHD group, insomnia severity was predicted by sleep reactivity, ADHD symptom score and being female, together explaining about a third of the variation (R squared = 0.32). Age and ADHD medication use did not predict it. The paper opens by calling insomnia the most common sleep problem among adults with ADHD.
Uygur H. Unraveling the insomnia puzzle: sleep reactivity, attention deficit hyperactivity symptoms, and insomnia severity in ADHD Patients. Front Psychiatry 2024. PMID 39911554
Sleep reactivity is the same trait described on our page about what causes insomnia. In other words, in this sample the ADHD group was not simply unlucky: it carried more of a known insomnia risk trait.
ADHD and sleep: what studies find
ADHD and sleep go together more often than chance would suggest, and the studies are clearer about the questionnaires than about the sleep laboratory. A meta-analysis of sleep in adults with ADHD pooled 13 studies and found that adults with ADHD differed from adults without it in seven of nine subjective sleep measures, and in two of five actigraphic ones (longer time to fall asleep, lower sleep efficiency). Polysomnography showed no significant differences. The authors concluded that self-reported sleep problems are significantly associated with adult ADHD and should be screened for, while it remains unclear whether objective sleep alterations underlie them.
Díaz-Román A, Mitchell R, Cortese S. Sleep in adults with ADHD: Systematic review and meta-analysis of subjective and objective studies. Neurosci Biobehav Rev 2018. PMID 29477617
ADHD and sleep problems in adults come from several directions at once, and the table sorts what each has behind it. ADHD and sleep disorders in general overlap: a review of the links between ADHD and movement disorders of sleep, parasomnias, hypersomnias and circadian rhythm disorders reports increased associations with restless legs syndrome, sleepwalking, narcolepsy, sleep apnea and delayed sleep phase.
Walters AS, Silvestri R, Zucconi M, et al. Review of the possible relationship and hypothetical links between attention deficit hyperactivity disorder (ADHD) and the simple sleep related movement disorders, parasomnias, hypersomnias, and circadian rhythm disorders. J Clin Sleep Med 2008. PMID 19110891
| Topic | What studies found | How strong |
|---|---|---|
| Sleep problems in adults | 13 studies pooled: adults with ADHD differed from adults without in 7 of 9 self-reported sleep measures (standardized differences 0.56 to 1.55) and in 2 of 5 actigraphy measures (longer sleep onset latency, lower sleep efficiency); no significant differences in polysomnography | Meta-analysis; objective sleep studies show less than questionnaires |
| Body clock | Delayed sleep phase disorder is reported in 73% to 78% of children and adults with ADHD in one review; a late clock fits the trouble falling asleep | Review |
| Sleep apnea | In adults only small reports exist: all 6 adults with ADHD and sleep complaints in a pilot had sleep-disordered breathing on polysomnography, and 3 adults treated for ADHD were later found to have sleep apnea | Weak: pilot study and case reports |
| Sleep deprivation | Sleep loss on its own impairs attention and can resemble ADHD symptoms, so unrecognized short sleep can confuse the picture | Review of sleep deprivation effects |
| Sleep paralysis | The only report found is of two children with ADHD; there are no adult data | Case report |
Bijlenga D, Vollebregt MA, Kooij JJS, et al. The role of the circadian system in the etiology and pathophysiology of ADHD: time to redefine ADHD? Atten Defic Hyperact Disord 2019. PMID 30927228
Surman CB, Thomas RJ, Aleardi M, et al. Adults with ADHD and sleep complaints: a pilot study identifying sleep-disordered breathing using polysomnography and sleep quality assessment. J Atten Disord 2006. PMID 16481672
Naseem S, Chaudhary B, Collop N. Attention deficit hyperactivity disorder in adults and obstructive sleep apnea. Chest 2001. PMID 11157621
Of these links, the body clock is the best supported: the 2019 review proposes that part of the symptoms of ADHD result from chronic sleep disorders, with most evidence for a delayed circadian rhythm, and that this subgroup deserves a look at the sleep disorder as well. Sleep apnea in adults with ADHD is a smaller literature, since the pilot had six people and the case report three. Lost sleep overlaps with ADHD in a different way, because insufficient sleep alone produces inattention. For sleep paralysis there is no adult study at all, so nothing can be said beyond noting the child case report; sleep paralysis that recurs is worth mentioning to a doctor either way.
None of this is a diagnosis. If you suspect ADHD, a body-clock disorder or sleep apnea in yourself, a doctor can sort out which applies, and a record of your nights helps with that conversation.
Four ways ADHD and sleep problems can be related
A review of the field is useful here because it refuses a single story. Its conceptual model has four modes: ADHD may cause sleep problems as an intrinsic feature of the disorder; sleep problems may cause or mimic ADHD; the two may interact, each feeding the other, with comorbid conditions in the mix; and they may share an underlying neurological cause. It also notes that ADHD often coexists with obstructive sleep apnea, periodic limb movements, restless legs syndrome and circadian-rhythm sleep disorders.
Hvolby A. Associations of sleep disturbance with ADHD: implications for treatment. Atten Defic Hyperact Disord 2015. PMID 25127644
The mimic mode is worth a paragraph, because it works in the direction people do not expect. A review of sleep deprivation research reports that sleep loss hits vigilant and executive attention and working memory, and that these deficits accumulate over time without the person being fully aware of them. Someone who is chronically short of sleep can therefore look inattentive for reasons that have nothing to do with ADHD. That is not an argument against taking ADHD seriously. It is the reason a careful assessment looks at sleep.
Goel N, Rao H, Durmer JS, Dinges DF. Neurocognitive consequences of sleep deprivation. Semin Neurol 2009. PMID 19742409
A racing mind, or a clock that runs late?
Insomnia and ADD come in two quite different patterns, and mixing them up is how people end up trying the wrong fix. One is the racing mind: you are in bed on time, tired, and thoughts will not stop. The other is a late clock: you are not sleepy until 2 a.m., but once asleep you sleep fine and wake badly.
The second pattern has support. A research team collected sleep logs, a week of wrist actigraphy and one night of saliva melatonin from 40 adults with ADHD, 31 of whom reported sleep-onset insomnia, and compared them with healthy controls. Both ADHD groups took longer to fall asleep and slept less efficiently. Those with ADHD and sleep-onset insomnia also had a delayed start and end of the sleep period and a delayed melatonin onset, compared both with adults with ADHD without sleep-onset insomnia and with controls, plus a flatter rest-activity rhythm over 24 hours. The authors suggested that rhythm-improving measures deserve study.
Van Veen MM, Kooij JJ, Boonstra AM, Gordijn MC, Van Someren EJ. Delayed circadian rhythm in adults with attention-deficit/hyperactivity disorder and chronic sleep-onset insomnia. Biol Psychiatry 2010. PMID 20163790
It is a small study from one group, and it describes people on average, not you. But it explains why plain advice to go to bed earlier fails for many: if the clock is late, early bed means lying awake. Delayed sleep phase disorder covers the extreme form of that pattern, and how to fix a sleep schedule covers the resetting side. The racing-mind pattern fits the arousal side of insomnia more than the clock side, and the standard insomnia treatments aim at it.
Stimulants and sleep: two studies that point different ways
This is the question that makes people nervous, so here is what the studies show, with their limits attached.
In young people, the evidence leans against stimulants for sleep. A meta-analysis of nine randomized studies with objective sleep measurement (246 children and teenagers with ADHD) found longer sleep latency (effect size 0.54), lower sleep efficiency (minus 0.32) and shorter total sleep time (minus 0.59) on stimulants. The effect was less evident the longer the young people had been on the medication.
Kidwell KM, Van Dyk TR, Lundahl A, Nelson TD. Stimulant Medications and Sleep for Youth With ADHD: A Meta-analysis. Pediatrics 2015. PMID 26598454
In the adult clinic sample above, the picture was the reverse: insomnia disorder was less common in patients on ADHD stimulant treatment than in untreated patients. The 2015 review adds that stimulants can disturb sleep but can also calm some patients enough to sleep by easing their symptoms, and that long-acting formulations can wear off before bedtime and let symptoms rebound.
Put those side by side and the summary is that it depends. Children in randomized trials and adults in a clinic survey are different situations, and neither tells you what your dose and timing are doing to your night. Do not change a prescription because of this page. If sleep started getting worse after a medication change, say so to the person who prescribes it; they can adjust timing or formulation, and a record of your nights makes that conversation concrete.
Insomnia and ADHD in adults: how much more often than in other people
Insomnia and ADHD travel together more often than chance would give, and the numbers vary with the method. A Norwegian study compared 268 clinically assessed adults with ADHD with 202 randomly selected controls. Lifetime sleep problems were reported by 82.6% against 36.5%, a current sleep duration under 6 hours by 26.6% against 7.6%, and the ADHD group also reported more excessive daytime sleepiness, loud snoring, breathing pauses during sleep, restless legs and periodic limb movements (significant odds ratios from 1.82 to 14.55). The authors stress screening for sleep disorders in adults with ADHD.
Bjorvatn B, Brevik EJ, Lundervold AJ, Halmøy A, Posserud MB, Instanes JT, et al. Adults with Attention Deficit Hyperactivity Disorder Report High Symptom Levels of Troubled Sleep, Restless Legs, and Cataplexy. Front Psychol 2017. PMID 28979226
A literature update puts the range in context: three cross-sectional studies, clinical and population-based, reported insomnia in 43% to 80% of adults with ADHD, against 31% to 56% in the general population, depending on how insomnia was defined. The same review notes that in randomized trials of ADHD medicines insomnia was reported more often in the treatment arm than in the placebo arm, and that longitudinal evidence for a link from childhood ADHD to later insomnia is mixed. That sits next to the mixed stimulant results above, which is why timing questions belong with the prescriber.
Wynchank D, Bijlenga D, Beekman AT, Kooij JJS, Penninx BW. Adult Attention-Deficit/Hyperactivity Disorder (ADHD) and Insomnia: an Update of the Literature. Curr Psychiatry Rep 2017. PMID 29086065
Read together with the 252-patient clinic study above, the pattern is consistent: more insomnia in ADHD, a wide spread in the exact figure, and a good reason to look for breathing and leg problems before assuming it is the busy mind alone.
What else can look like ADHD insomnia
The review of ADHD and sleep lists restless legs, limb movements, sleep apnea and circadian disorders as frequent companions, and they are the ones not to miss. Restless legs syndrome makes sleep onset miserable in a way that is easy to blame on a busy mind. Sleep apnea fragments the night and does not always come with snoring; sleep apnea without snoring explains the signs. Caffeine, evening screens and an irregular schedule matter in ADHD as in everyone else, and mood and anxiety problems were frequent in the clinic sample, which makes them another thing to raise with a doctor.
Please get these checked rather than self-managing: loud snoring with pauses or gasping, an urge to move your legs that eases when you walk, sleepiness serious enough to affect driving, or low mood that has been heavy for weeks (in the US, call or text 988 if you have thoughts of harming yourself). SleepTrace is not a medical device and cannot diagnose ADHD or any sleep disorder.
What helps, as far as the evidence goes
Two general statements stand on firm ground. Guidelines for adults with chronic insomnia recommend cognitive behavioral therapy for insomnia before medication, and the review of ADHD and sleep names healthy sleep practices as the first-line approach, with sleep assessed before any drug treatment is started. A clinician who knows both topics can combine them better than a general rule can.
Qaseem A, Kansagara D, Forciea MA, Cooke M, Denberg TD, Clinical Guidelines Committee of the American College of Physicians. Management of Chronic Insomnia Disorder in Adults: A Clinical Practice Guideline From the American College of Physicians. Ann Intern Med 2016. PMID 27136449
If you want to look at your own pattern before an appointment, a week of recordings helps in one narrow way. SleepTrace and similar recording apps can show when the room goes quiet after lights out and what the sound looks like through the night. It cannot measure sleep onset precisely, because it works from sound and not brain waves, but it can separate a night that begins late from a night that begins on time and stays busy.
Picture a made-up week (invented, not measured). Say you record seven nights and the room goes quiet by about 11:30 on all of them, with rustling and shifting sounds for the first hour, while on the weekend nights it goes quiet at 2:30 and stays calm until noon. That looks like a clock that drifts late whenever nothing forces it, and the restless hour on weeknights is the body not being ready yet. If instead the room is quiet by midnight every night and the daytime tiredness is bad anyway, look at breathing and legs first. In both cases you arrive with something specific. For the how-to, see how to record yourself sleeping.
Frequently asked questions
ADHD (the current name for ADD) is associated with insomnia, and a review lists ADHD as one possible cause of sleep problems. In a clinic sample of 252 adults with ADHD, 44.4% had insomnia disorder. Association is not proof of cause, though: sleep problems can also mimic ADHD, and the two can share a biological root.
There are at least three common patterns: a racing mind at bedtime, a body clock that runs late (one study found delayed melatonin onset in adults with ADHD and sleep-onset insomnia), and other sleep disorders such as restless legs or sleep apnea, which are more common in ADHD. Medication timing can matter too. Which pattern is yours is something to work out with a clinician.
In a meta-analysis of nine randomized studies in children and teenagers (246 young people), stimulants led to longer sleep latency, lower sleep efficiency and shorter sleep. In adults, the clinic study above found the opposite association: insomnia disorder was less common in treated patients than in untreated ones. These are different populations and designs. Do not change a prescribed medication on your own; talk to the prescriber about timing.
Yes. Sleep loss impairs attention, working memory and executive function, and the deficits can build up without the person being aware of them. A review of ADHD and sleep says sleep problems may cause or mimic ADHD, which is why clinicians are advised to assess sleep during an ADHD evaluation.
Guidelines for chronic insomnia in adults put cognitive behavioral therapy for insomnia first, and a review of ADHD and sleep names healthy sleep practices as the first-line option. A doctor can also check for restless legs, sleep apnea and the timing of any stimulant.
A meta-analysis of 13 studies in adults found that those with ADHD reported significantly more sleep problems than adults without it, in seven of nine subjective measures, while polysomnography showed no significant differences. A delayed body clock is the best-supported link, reported in 73% to 78% of children and adults with ADHD in one review. Ask a doctor to sort out whether ADHD, a body-clock disorder or sleep apnea is behind your own sleep trouble.
Reported figures range widely with the method. A literature update found insomnia in 43% to 80% of adults with ADHD in three studies, against 31% to 56% in the general population. A Norwegian study of 268 adults with ADHD and 202 controls found lifetime sleep problems in 82.6% against 36.5%.
SleepTrace is a wellness app, not a medical device. This article is general information, not medical advice. If your symptoms are frequent, severe or worrying, please talk to a doctor.
ADHD and insomnia can feed each other, and sorting out which comes first is a job for a clinician. SleepTrace adds a record of your estimated sleep phases and any snoring or possible breathing pauses across weeks. It does not measure thoughts, restlessness or medication effects, it only records the sound of the night, and tracking is free.
Hear your own night. SleepTrace turns a night of audio into your sleep phases, the sounds you made, and how it all trends. Works without a wearable, better with one. Your phone on the nightstand is enough to start. Get it for iPhone or Android →