ADHD and Sleep in Adults: Why They Are Connected

ADHD and sleep problems often go together: NIMH says sleep problems affect up to 70% of adults with ADHD. Common ones include a body clock that runs late, insomnia and restless legs. Stimulant medicine can also cause trouble sleeping, so your provider decides when you take it, and loud snoring or gasping at night needs its own evaluation.

If you are considering adult ADHD treatment in Ocala at Padgett Medical Center, it helps to know how the two interact, because some sleep disorders can cause symptoms that look like ADHD.

How common are sleep problems in adults with ADHD?

Very common. Beyond NIMH's estimate, a 2024 study of 3,691 adults diagnosed with ADHD at a Dutch specialty clinic found that about 60% screened positive for at least one sleep disorder on a questionnaire they filled out during their diagnostic assessment. The most frequent were symptoms of a delayed sleep phase, meaning a body clock that runs late (36%), insomnia (30%), and restless legs or limb movements during sleep (29%). A positive screen is not a diagnosis.

In the same study, sleep problems were linked with depression, anxiety, substance use disorders, personality disorders and post-traumatic stress disorder, one more reason to describe your sleep, mood and any alcohol or drug use honestly at your evaluation; see ADHD or anxiety in adults.

Why do adults with ADHD have trouble falling asleep?

One common reason is a body clock that runs late. Melatonin, a hormone your brain makes in response to darkness, helps time your 24-hour internal clock and your sleep, according to the National Center for Complementary and Integrative Health (NCCIH). In a 2010 study of 40 adults with ADHD, 31 reported chronic trouble falling asleep. Compared with healthy adults, those 31 started and ended their sleep later, and their evening rise in melatonin came later too.

When a late clock makes it hard to fall asleep and wake at the usual times, it can be a sleep disorder: delayed sleep-wake phase disorder. NCCIH says people with it typically have trouble getting to sleep before 2 to 6 a.m. and would prefer to wake between 10 a.m. and 1 p.m., so an 8 a.m. start can cut sleep short night after night. NCCIH also notes that light at night can block melatonin production, and the 2024 study's authors add that sleep problems may be linked in both directions with ADHD severity and other psychiatric symptoms.

Can a sleep disorder cause ADHD-like symptoms?

Yes. NIMH lists sleep disorders, along with stress, anxiety, depression and other illnesses, among the conditions that can cause symptoms similar to those of ADHD. The National Heart, Lung, and Blood Institute (NHLBI) says the daytime sleepiness and tiredness that come with sleep apnea can lead to problems with learning, focusing and reacting. That overlap is one reason to describe your sleep at an ADHD evaluation, and some adults turn out to have both.

When does a sleep problem need its own evaluation?

When the signs point to a sleep disorder such as sleep apnea or restless legs. For sleep apnea, NHLBI lists breathing that starts and stops, frequent loud snoring and gasping for air during sleep, and notes you may not know about them until someone tells you. On your own, you might notice daytime sleepiness, a dry mouth, headaches, insomnia or getting up often at night to urinate. To diagnose it, NHLBI says, your provider will ask you to see a sleep specialist or go to a center for a sleep study. If weight is part of your picture, see how sleep and weight affect each other.

Restless legs syndrome (RLS) causes a powerful urge to move your legs, which feel uncomfortable when you lie down or sit, and it can make it hard to fall asleep and stay asleep, MedlinePlus explains; sometimes another condition, such as anemia, is behind it. In a 2019 study of 200 adults with ADHD, 33% had RLS, and 35.5% had low iron by the study's definition, which was more common in those with RLS. Mention any leg discomfort at night, and let your provider decide whether testing makes sense.

Can ADHD medication affect your sleep?

Yes, for some people. The FDA labels for two stimulants, Concerta (methylphenidate) and Vyvanse (lisdexamfetamine), both list insomnia among the most common side effects in adults. In the 4-week study of adults with ADHD described in the Vyvanse label, 27% of those taking it reported insomnia, compared with 8% on placebo. For how the medicines compare, non-stimulants included, see adult ADHD medication options.

Not every sleep complaint comes from the medicine, though, so tell your provider how you slept before you started it. And don't stop a stimulant on your own to sleep better: the Vyvanse label lists insomnia or sleeping too much among the withdrawal signs that can follow stopping suddenly or cutting the dose after long use.

Who decides when you take ADHD medication?

Your provider does. When you take a medicine is part of your treatment plan, just like how much. The Vyvanse label, for example, gives directions on the time of day to take it because of the potential for insomnia. In deciding yours, your provider weighs your workday, when you most need to focus and how you sleep.

If you sleep poorly on a medicine, or it wears off before your evening ends, tell your provider rather than moving, skipping or adding a dose yourself; your provider decides whether anything should change.

Which sleep habits help adults with ADHD?

Start with routine. NIMH's self-help tips for ADHD include sticking to a consistent routine, getting regular exercise, eating regular, healthy meals, turning off screens at least an hour before bedtime and getting 7 to 9 hours of sleep every night.

A few practical adjustments may make those tips easier to keep. One idea: set an alarm for winding down, not only for waking, so bedtime doesn't slip past while you're absorbed in something. Keep the same wake-up time every morning, weekends included, and get out of bed when you can't sleep instead of scrolling; both come from stimulus control, a method in the American Academy of Sleep Medicine (AASM) insomnia guideline that also reserves the bed for sleep and sex. Go easy on caffeine, alcohol and tobacco, which MedlinePlus says may make restless legs worse.

What if better sleep habits are not enough?

Ask your provider about cognitive behavioral therapy for insomnia (CBT-I). The AASM's 2021 guideline strongly recommends multicomponent CBT-I for chronic insomnia in adults, and it suggests not using sleep hygiene tips alone as the treatment. CBT-I pairs education about how sleep is regulated and work on unhelpful thoughts about sleep with techniques such as stimulus control and sleep restriction, and it usually takes 4 to 8 sessions guided by a sleep diary.

Do it with a trained clinician rather than on your own. The guideline notes that early in CBT-I, people can feel more tired, sleepy or irritable and have trouble paying attention, effects that usually fade by the end of treatment. It adds that sleep restriction may not be appropriate for people in high-risk jobs, such as drivers or heavy machinery operators, or for people prone to mania or with poorly controlled seizures. Research in ADHD is still small: a 2025 review of eight studies, five of them in children and teens, found short-term benefits in people with ADHD or autism, but results were inconsistent and mostly not maintained at follow-up.

How does ADHD care work at Padgett in Ocala?

Your first visit is a 30-minute evaluation with Sarah Weir, APRN (advanced practice registered nurse), always in person at our clinic at 200 SW 8th St., Suite A, Ocala. It covers your symptoms, how long you have had them (including in childhood), how they affect work and home, your health history, current medications and any prior records. Bring up sleep there: your usual bedtime and wake time, snoring a partner has noticed, restless legs, and every sleep aid you use, including melatonin.

New patients pay $260 for the first visit, or $169 when they book online with a card on file (35% off). College students who book online with a card on file and a valid college ID, checked at the visit, pay $130 for the first visit (50% off instead of 35%); see ADHD treatment for college students. Your plan may include medication, which you and your provider choose together, as well as non-medication strategies. No medication or diagnosis is promised in advance, and any medication is filled at your own pharmacy and is not part of the visit fee.

Follow-ups are $136, the same for everyone, in person or by telehealth while you are physically in Florida, and they are a good time to report how you are sleeping; ADHD care by telehealth in Florida explains how those visits work. There are no contracts. The only other charge is a $50 no-show fee if you miss a visit without canceling or rescheduling at least 24 hours ahead.

Questions first? Ask for a free 15-minute phone call with the medical staff; it is not a visit with the provider and nothing is prescribed on it. When you're ready, book your first ADHD visit online. Nothing is charged when you book, and a card on file holds your visit; without one, your appointment is confirmed once staff reach you by phone. You can also call (352) 369-0104, Monday to Friday, 9:00 AM to 5:00 PM.

This article is educational and is not medical advice. Talk with a licensed provider about your own health, medications and treatment options.