ADHD in adults

ADHD stands for attention-deficit/hyperactivity disorder. It is a difference in how the brain develops that affects attention, activity level and self-control. It starts in childhood, but for many people it lasts into adult life.^1,3

Many adults never knew they had it. They may have spent years feeling scattered, late or "lazy," when the real cause was a treatable condition. This page gives you the big picture and points you to every page in our ADHD section.

What is ADHD?

ADHD has two main groups of symptoms:¹

• Inattention: trouble paying attention, staying on task and staying organized.
• Hyperactivity and impulsivity: moving or fidgeting a lot, feeling restless, talking a lot, interrupting, or having a hard time waiting.

Some people have mostly the first kind. Some have mostly the second. Many have both, which doctors call the combined type.^1,4

Everyone gets distracted or forgets things now and then. ADHD is different because the symptoms are stronger and more frequent than usual. They last at least six months, show up in more than one part of life (such as home and work), and cause real problems day to day.²

How ADHD can look in adults

ADHD often changes with age. Trouble paying attention tends to stay. Hyperactivity and impulsivity are more likely to fade, or turn into a feeling of inner restlessness.^2,3

These examples come from NIMH and CDC.^1,2,3 Sleep problems are very common too. Up to 7 in 10 adults with ADHD have them.²

Symptoms can get worse as life demands grow, such as with a new job, a baby or caring for a parent.³ To learn more, including how ADHD can look in women and how it affects driving and emotions, see Signs of ADHD in adults.

What causes ADHD?

No one knows the exact cause. Genes play a large role, and ADHD often runs in families.⁴ Other possible risk factors include lead and other exposures in early life, alcohol or tobacco use during pregnancy, and head injuries in childhood.⁴ ADHD is not a lack of willpower. It is a real health condition.

How is ADHD diagnosed in adults?

There is no blood test or brain scan for ADHD. A doctor or mental health professional makes the diagnosis by talking with you and reviewing your history.³

The process often includes:^2,3

• A symptom checklist. One common short screener for adults is the Adult ADHD Self-Report Scale (ASRS). Its six-question version was developed with the World Health Organization.¹² A high score is a reason to get checked, not a diagnosis.
• A look back at childhood. Some symptoms must have started before age 12. School report cards or talks with family members can help.
• A symptom count. Adults 17 and older need at least five symptoms in a group, compared with six for children.
• Ruling out other causes. Anxiety, depression, sleep problems, substance use and learning disorders can all look like ADHD or come along with it.

Primary care doctors are the main source of outpatient ADHD care for adults.¹³ In 2023, about 1 in 11 adults with ADHD had been diagnosed only through telehealth visits.⁵ See getting an adult ADHD diagnosis for each step and cautions about online services.

What treatments help?

ADHD can be managed. The best plan depends on the person, and it often changes over time.³ As of October 2026, an expert group (APSARD) is finishing the first U.S. guidelines for adult ADHD. They are expected to be published in fall 2026.¹¹

Medicine plus therapy often works best, and some people need to try more than one option.² If ADHD gets in the way at work, you may qualify for reasonable accommodations under the Americans with Disabilities Act (ADA), such as fewer distractions.^2,3

Safety with ADHD medicines

• Heart and blood pressure. Stimulants raise blood pressure and heart rate a little on average, and more in some people. Before starting, your doctor should ask about heart disease and any family history of sudden death or irregular heartbeat. Blood pressure and pulse should be checked during treatment.⁹
• Misuse and addiction. In 2023, the FDA required the boxed warning (its strongest warning) on all prescription stimulants to be updated. It now describes the risks of misuse, addiction and overdose the same way for every stimulant.¹⁰ Take your medicine only as prescribed. Never share it. Store it out of reach of visitors and grandchildren.¹⁰
• Pills from other sources. Never buy stimulants online or from friends. Fake pills may contain fentanyl or methamphetamine.¹⁰
• Shortages. In late 2023, about 7 in 10 adults taking stimulants had trouble filling a prescription because the medicine was not in stock.⁵

Never start, stop or change an ADHD medicine on your own. Talk with your doctor or pharmacist before changing anything.

ADHD in later life

ADHD does not go away just because a person gets older. A review of studies in adults 50 and older found that about 2 in 100 had high levels of ADHD symptoms. But fewer than 1 in 400 had a clinical diagnosis, and even fewer were being treated.⁶

Some ADHD symptoms, like forgetfulness and trouble focusing, can look like mild cognitive impairment or early dementia. Depression, sleep problems and some medicines can cause the same signs. The authors of that review warned that screening tools alone may overcount ADHD in older people for this reason.⁶

One clue is timing. ADHD symptoms start in childhood, before age 12.² Memory problems that are new or getting worse point to something else and need a medical check. Stimulant labels advise extra caution in people 65 and older, because heart, liver and kidney function can weaken with age.⁹ Read more in ADHD in later life.

ADHD and other conditions

ADHD rarely travels alone. Anxiety, depression, learning disorders and sleep problems are common alongside it.¹ Teens and adults with ADHD also have a higher chance of substance use problems.¹

See ADHD with anxiety, depression and substance use, and our hubs on anxiety, depression and sleep.

All pages in this section

• Signs of ADHD in adults: symptoms, work, money, driving, women and emotions
• Getting an adult ADHD diagnosis: the ASRS screener, evaluation steps and telehealth cautions
• ADHD medicines: stimulants, non-stimulants, heart checks, misuse and shortages
• Therapy and coaching for ADHD: CBT, coaching and workplace accommodations
• Everyday strategies for ADHD: reminders, routines, body doubling, sleep and exercise
• ADHD in later life: ADHD vs mild cognitive impairment and medicine safety
• ADHD with anxiety, depression and substance use: common overlaps and which to treat first

In this section

When to get help

Talk with your doctor or a mental health professional if:

• Trouble with focus, time or organizing has caused problems at work, with money or in relationships for a long time.
• You have struggled with these things since you were a child.
• Low mood, worry, alcohol or drug use seem tied to these struggles.
• An older family member has new memory or attention problems. This needs a full medical exam, not just an ADHD check.

You can take a quick mood and stress check on our Check-in page. For ways to find care, see Get help.

Education only. This page is general information written from the sources listed. It is not medical, legal or financial advice and does not replace a doctor, therapist or lawyer who knows your situation. How we write and check pages.