Attention Deficit Hyperactivity Disorder (ADHD)

It is becoming more common to hear the term attention deficit hyperactivity disorder (ADHD), and many people are curious about it. MEDvidi has many helpful articles all about ADHD, and this page will give you an ADHD overview and point you to your area of interest.

Dorianne Green
Written by:
Dorianne Green
Medical Writer
Dr. Henry Bradford
Medical Reviewer:
Dr. Henry Bradford
MD

ADHD Explained

The American Psychiatric Association[1] gives the following simple definition of ADHD:
“… a behavioral condition that makes focusing on everyday requests and routines challenging.

ADHD is a common childhood neurodevelopmental disorder. ‘Neuro’ means brain or nerve; in kids, it often presents as learning disabilities and naughtiness. However, it can persist into adulthood, impacting daily life, relationships, and work performance.

Do you suspect you may have ADHD?
Take this free online 5-minute test.

ADHD vs ADD

Attention deficit disorder (ADD) was a term used before 1987[2] when it was changed to attention deficit hyperactivity disorder (ADHD). ADD is no longer an official diagnosis but is still sometimes used for predominantly inattentive ADHD.

Prevalence of Adult ADHD

ADHD in adults is common; a Center for Disease Control (CDC) survey in 2023 estimated that 15.5 million of U.S. adults have ADHD[3] .

Prevalence of Adult ADHD

ADHD Across the Lifespan

ADHD is often seen as a childhood condition, with an estimated 11.3% of school-age kids[4] affected. However, many children with ADHD (4 to 6 out of 10) continue with symptoms into adulthood. Importantly, some cases of ADHD might go unrecognized and only be diagnosed later in life.

  • Many adults diagnosed with ADHD look back and realize that they have probably had symptoms since childhood, but their parents never sought help; others may have intentionally masked their symptoms in an attempt to ‘fit in.’
  • Next, there is the group that might have had their ADHD symptoms ‘masked’ by a high IQ or stable and supportive environments[5] and present them when adult life circumstances become challenging.
  • Finally, high-functioning ADHD is a term, not a diagnosis, used to describe people with ADHD that function normally and are successful in life, possibly due to effective coping techniques and a protective environment where external stressors were low.

ADHD Symptoms and Signs

ADHD symptoms fall into the following categories: inattention, hyperactivity, and impulsivity.
  • Careless mistakes
  • Being easily distracted
  • Trouble paying attention
  • Avoiding tasks that require sustained mental effort
  • Poor work quality
  • Neglecting chores and health
  • Having poor time management
  • Losing things
  • Often being late
  • Daydreaming
  • Being messy
  • Missing deadlines
  • Being restless and agitated
  • Frequent fidgeting
  • Difficulty waiting their turn in queues and conversations
  • Being loud and talking too much
  • Doing irresponsible things because of impulsive behaviors
  • Being accident prone
  • Constantly “on the go”
Understanding ADHD symptoms

Learn how ADHD manifests in different ways and what it means for you.

How ADHD Is Diagnosed in Adults

Doctors diagnose ADHD using official guidelines[6] from the American Psychiatric Association’s Diagnostic and Statistical Manual (DSM-5), which lists nine ADHD symptoms in each category:

  • Inattentive
  • Hyperactive/Impulsive

The person seeks help from an HCP

After researching and understanding that they might have ADHD, they make an appointment with a healthcare professional (HCP).

This points the HCP in a diagnostic direction; could it be ADHD, another mental health condition, or a physical disorder?

The HCP takes a medical history

The patient completes questionnaires

The HCP looks for ADHD symptom categories and how many symptoms there are.

To check health conditions with similar symptoms off the list, you might need a referral for medical evaluation and blood tests.

The HCP excludes other conditions if necessary

The HCP makes a diagnosis according to DSM-5[6]

To be diagnosed with ADHD, the person must:

  1. Have a certain number of symptoms (≥6 for children; ≥5 for adults)
  2. Must have persistent symptoms (≥6 months)
  3. Have a problem with daily functioning in two or more settings
  4. Not have any other medical reason for the symptoms
Extra facts about ADHD diagnosis

Explore the process of diagnosing ADHD in more detail.

Types of ADHD

When doctors diagnose ADHD, they will classify it by type according to these categories:
Predominantly inattentive type (2 out of 10 people)

Inattentive ADHD is diagnosed when there are:

  • Five or more symptoms of inattention
  • Not enough hyperactivity/impulsivity
Predominantly hyperactive-impulsive type (1 out of 10 people)

Hyperactive-impulsive ADHD is diagnosed when there are:

  • Five or more symptoms of hyperactivity/impulsivity
  • Not enough inattention
Combined type
(7 out of 10 people[7] )

Combined type ADHD is diagnosed when there are:

  • Five or more symptoms of inattention
  • Five or more symptoms of hyperactivity/impulsivity
ADHD types explained in more detail

Get a clear breakdown of the different ADHD types and how they present.

Causes and Risk Factors

There are many myths surrounding ADHD causes. However, too much sugar, a lack of micronutrients, excess screen time, and poor parenting practices have not been proven to cause ADHD.

Most risk factors for developing ADHD come down to genetics; basically, it runs in families. However, a person’s circumstances, like exposure while in the womb to toxines, a mother’s trauma or smoking, or having a low birth weight or brain injury at birth, also play a more minor role.

These genetic and environmental factors influence the central nervous system and brain development in some way. Remember, ADHD is a neurodevelopmental disorder, which means brain or nerve development disorder. The ADHD brain is smaller with some structural differences than the non-ADHD brain, and its messenger chemicals can’t work effectively; therefore, it functions differently.

Prognosis and Outlook

Many children with ADHD symptoms have good long-term outcomes[8] , but others have a higher risk of bad behavior, depression, and substance abuse in adulthood.

Symptom control is key to normal functioning and reducing stress levels, and good outcomes are more easily achieved at all ages if treatment starts early; this usually involves a combination of medication and therapy.

Treatment Options

A healthcare provider will decide on a personalized ADHD treatment plan, as there is no one-size-fits-all solution. The correct choice might differ depending on specific symptoms, health status, and co-occurring conditions.

ADHD Medication

There are two types of ADHD medication: stimulants and non-stimulants.

STIMULANTS

Amphetamines and methylphenidates

  • Prescription medication
  • Controlled
  • Work within hours
  • Work for 4 to 12 hours
  • Often have side effects
  • Usually first-line medication
NON-STIMULANTS

Norepinephrine modulators and alpha agonists

  • Prescription medication
  • Not controlled
  • Take weeks to start working
  • Work up to 24 hours
  • Fewer side effects
  • Usually second-line medication

Therapy

Doctors often combine ADHD medication and therapy for better results.

COGNITIVE-BEHAVIORAL THERAPY (CBT)
CBT, a type of talk therapy, helps to change the feelings related to thoughts, converting negative to positive behaviors.
FAMILY/RELATIONSHIP THERAPY
It helps to explain ADHD symptoms and behavior to loved ones; if they understand the condition, they can be more accepting and supportive.
Learn more about ADHD treatment
A deeper understanding of ADHD treatment is a click away.

Living With Adult ADHD

Unfortunately, it is usual that ADHD affects personal and professional daily life to some degree.

Successfully treating ADHD requires not only taking medication or seeing a therapist but also managing symptoms at home and work.

Healthy Habits and Self-Care Practices

Healthy behaviors, such as exercising more, eating balanced meals, quitting smoking, and reducing alcohol intake, are essential for peak brain functioning. Just as important is reducing stress through taking ‘me-time’; this could be anything from hobbies to a long candle-lit bath or a spa day.

Task and Time Management

For most people, because of difficulty sustaining attention, ADHD means learning to effectively manage task schedules with lists, calendars, apps, reminders, and alarms. Other valuable tactics are breaking overwhelming tasks into manageable pieces and setting clear goals.

Support Systems
ADHD coaching and online communities offer additional support and may provide helpful advice based on personal experiences.
Learning and Workplace Accommodations
According to the Individuals with Disabilities Education Act, young adults with severe ADHD up to age 21 may qualify for special learning conditions. Adults whose job functioning is badly affected by ADHD may also qualify for personalized work circumstances.

When to See a Doctor

ADHD diagnosed in adulthood can be life-changing, so when is it time to seek help?

Anyone who suspects they may have attention deficit hyperactivity disorder should make an appointment with a healthcare professional if they have:

  • Symptoms of inattention, hyperactivity, and impulsivity affecting daily function at work and home.
  • Thoughts of self-harm or suicide.
  • Anxiety or a depressed mood that has been present most days in the past two weeks.
  • Social relationships that are breaking down.
  • Loved ones showing concern.
  • Poor results from self-help strategies.
  • A feeling that their current treatment is not helping.
Are you thinking about taking the next step in your ADHD assessment?
Explore which healthcare professionals can diagnose and treat ADHD.

Far-Reaching Effects of ADHD

Untreated ADHD in adults leaves symptoms uncontrolled, having potentially devastating consequences such as:

  • Relationship breakdowns and divorce
  • Social isolation due to stigma[9] and low self-esteem
  • Mental health issues like depression and anxiety[10]
  • Increased suicidal[11] thoughts and attempts
  • Inability to earn a living
  • Car accidents[7]
  • High-risk behavior[7] , such as substance use

ADHD Challenges

Executive Functioning Deficits
Many ADHD symptoms and behaviors result from executive dysfunction of working memory[12] . This means the brain has difficulty organizing tasks in order of importance and making logical decisions. Learn more
Emotional Dysregulation
Not being able to control emotions[13] properly is one of the characteristics of ADHD and can result in sudden and extreme mood swings. Learn more
Rejection Sensitive Dysphoria (RSD)
ADHD-related emotional dysregulation predisposes to rejection sensitive dysphoria (RSD), which is an exaggerated overreaction to perceived rejection. Key features of RSD are that it causes emotional turmoil and is not easy to shake. Learn more
Hyperfocus
Hyperfocus, for example, on a hobby, is one of the unusual ADHD tendencies; it doesn't seem to make sense because ADHD is defined by poor focus, isn't it? However, people with ADHD battle to control their attention[14] , so their brains take them where they 'want' to go, not where they 'need' to. Learn more
ADHD Paralysis
ADHD paralysis is one of the most disabling traits of ADHD. It results from feeling so overwhelmed that the only way your body copes is not to tackle the situation at all by shutting down or freezing. Learn more
Time Blindness
Adults with ADHD have decreased function in areas of their brains[15] essential for understanding time intervals; the result is the abnormal judgment of time, which might present as failing to meet deadlines or always running late.Learn more
Brain Fog
ADHD symptoms can cause brain overload, fuzziness, or haziness, resulting in unclear and jumbled thoughts.
Forgetfulness
People with ADHD tend to be forgetful because their brains are known to have poor working memory[16] . Learn more
Sensory Processing Issues
There are three common sensory issues[17] associated with ADHD:
  • Over-responsivity — being overwhelmed by inputs
  • Under-responsivity — not responding to normal inputs
  • Craving — seeking out intense sensory experiences

Sensory over-stimulation might be triggered by ADHD-associated anxiety. Learn more

Sleep Problems
Individuals with ADHD are known to have poor-quality sleep, which can lead to daytime sleepiness and further impact attention. In fact, studies estimate that between 4 to 7 out of 10 adults[18] with ADHD have insomnia. Learn more
Masking
Many individuals with ADHD hide their condition because of the social stigma[19] associated with the symptoms; this might present as over-preparing, working long hours, or making excuses. For this reason, masking might result in undiagnosed ADHD. Learn more
Perfectionism
Often, perfectionism becomes an unhelpful coping mechanism because of the fear of making mistakes[20] .
ADHD Burnout
People with ADHD burn energy by being hyperactive and trying to stay focused[21] , which can lead to emotional, physical, and mental burnout. Learn more
ADHD Fatigue
Adults with ADHD, especially the inattentive type, are known to experience significant physical and mental tiredness[22] . Interestingly, a study showed[23] similarities between ADHD and chronic fatigue syndrome (CFS). Learn more
Procrastination
The ADHD brain struggles to prioritize tasks. When combined with drifting attention, this results in an illogical delay in essential duties, which causes even more frustration. Learn more
Co-existing Conditions
Many other mental health conditions co-occur with ADHD and also require treatment. Some common examples are mood disorders (depression), anxiety disorders, oppositional defiant disorder, and conduct disorder.
Reduce or prevent the negative impact of ADHD on your life by getting professional care and recommendations.
Frequently Asked Questions

ADHD is not a disability by definition; it is a mental health condition that falls under brain development disorders. In some cases, if ADHD permanently affects someone’s ability to work, learn, or socialize, it might be classified as a disability. The person might qualify for special work or learning conditions in these circumstances.

In adults, ADHD is most commonly mistaken for anxiety[10] or depression. However, many other conditions may mimic ADHD, including autism spectrum disorder, bipolar disorder, sleep disorders, substance use, trauma, and any medical condition causing tiredness and fatigue.

Yes, you can overcome ADHD symptoms with the help of therapy and medication. Some people do ‘outgrow’ it or do not need medication anymore if they experience a change in life circumstances.

Absolutely, people with ADHD can live a normal life by seeking help and getting onto a personalized treatment plan.

Nordby ES, Guribye F, Nordgreen T, Lundervold AJ. Silver linings of ADHD: a thematic analysis of adults’ positive experiences with living with ADHD. BMJ Open. 2023;13(10).

For some people, ADHD gets better with age; about 4 out of 10 children with ADHD ‘outgrow’ their condition, and for older adults, symptoms might settle when life circumstances get more manageable.

It is challenging to prevent attention deficit hyperactivity disorder itself because it is mainly genetic, even though some environmental risk factors might be controllable. It is, however, possible to prevent ADHD symptoms from causing problems in daily life by getting help from a healthcare professional.

Learn more about ADHD

Sources

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23 sources
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