What is the difference between ADD and ADHD?

ADD is an older name. The current diagnosis is ADHD, which comes in three presentations: predominantly inattentive, predominantly hyperactive-impulsive, and combined. What most adults mean by ADD is the inattentive presentation, where hyperactivity is absent or shows up only as inner restlessness.

Can ADHD start in adulthood?

By definition, no. ADHD is a neurodevelopmental condition and the symptoms begin in childhood, even if nobody recognized them at the time. Attention problems that begin in adulthood usually have another cause, such as a sleep disorder, depression or anxiety, thyroid disease, medication, a head injury, or early cognitive decline, and that is what the evaluation looks for.

Is there an ADHD test for adults?

No single test. Online screeners such as the Adult ADHD Self-Report Scale are useful for deciding whether to seek an evaluation, but they cannot diagnose ADHD or rule out the conditions that mimic it. Roughly one in three people who screen positive turn out not to have ADHD on full assessment. The diagnosis is clinical, based on a detailed history going back to childhood, standardized rating scales, and sometimes input from a partner or parent. Neuropsychological testing is added when the picture is unclear or a learning disorder is suspected.

Do I need ADHD medication?

Not necessarily. The decision depends on how much the symptoms cost you day to day, what else is contributing, and your own preference. Some adults do well with structure, coaching, and skills-based therapy alone; others find medication makes those strategies workable. It is a conversation after the evaluation, not a foregone conclusion.

Does adult ADHD look different in women?

Often, yes. Women are more often diagnosed with the inattentive presentation, with daydreaming, disorganization, and exhaustion from masking the difficulty rather than visible restlessness, and inattentive symptoms in women are more likely to be missed, which is why the diagnosis is so often delayed past childhood. Many women also report that symptoms shift across the menstrual cycle, in pregnancy, and around perimenopause, and early research links this to falling estrogen. The evidence is still preliminary, so it is not yet a reason to change treatment around the cycle.

Do you prescribe stimulant medication?

Medication is discussed only after the evaluation confirms the diagnosis. Stimulants are controlled substances with federal and state prescribing rules, and any prescription is paired with monitoring of blood pressure, heart rate, sleep, and side effects. Non-stimulant options exist for people who cannot take stimulants or prefer not to.

Can adult ADHD be evaluated by telehealth?

The history and rating scales work well by video, and we see patients anywhere in California. Some steps, including certain prescriptions, carry additional requirements that may call for an in-person visit, and we will tell you before you book if that applies.

Adult ADHD (ADD): Symptoms, Diagnosis and Treatment

Adult Attention Deficit Disorder: Symptoms, Diagnosis, and Treatment

Adult ADHD, still often called ADD, is a lifelong pattern of inattention, disorganization, and impulsivity that began in childhood and still interferes with work or relationships. There is no blood test or scan for it. The diagnosis rests on a careful history, rating scales, and ruling out sleep disorders, mood disorders, thyroid disease, and other conditions that mimic it.

Medically reviewed by Dr. Achillefs Ntranos, MDPublished September 14, 2024Updated September 3, 20269 min read

Attention deficit disorder is not only a childhood condition. Plenty of adults have lived with it undiagnosed for decades, working twice as hard for the same result. It also has a long list of look-alikes, and a neurologist's evaluation spends as much time on those as on ADHD itself, because several of them are treatable in their own right.

What adult ADHD is

Attention deficit disorder, now diagnosed as attention deficit hyperactivity disorder, begins in childhood even when it is recognized only much later. In adults the visible hyperactivity usually fades while the inattention, disorganization, and impulsivity persist and cause most of the trouble.

It runs strongly in families, and a parent or sibling with ADHD is the most common risk factor. The differences behind it involve dopamine and norepinephrine signaling and the development of frontal brain regions that handle planning, attention, and impulse control. Premature birth, low birth weight, and early exposure to toxins such as lead raise the risk. None of this is caused by upbringing or effort.

A brain illustration in soft copper and slate blue with fine botanical accents.

Adult ADHD symptoms

Inattention. Difficulty focusing, easily distracted, losing track of details, forgetful in daily routines
Disorganization. Trouble managing time, missed deadlines, misplaced essentials
Impulsivity. Hasty decisions, interrupting, difficulty waiting
Emotional dysregulation. Mood swings, low frustration tolerance, difficulty riding out stress
Restlessness. An inner sense of being on edge rather than physical hyperactivity

For these to point to ADHD, they must have been present since childhood, occur in more than one setting, and genuinely affect daily functioning. Everyone is distractible sometimes. The question is whether this has been the shape of your life.

In women, and in anyone with the inattentive presentation, the picture is quieter: daydreaming rather than disruption, chronic lateness, unfinished projects, and a lot of effort spent hiding the difficulty. That is why many women are diagnosed only as adults, often when a child is diagnosed first or when the workload of a new job or parenthood outgrows the coping strategies.

Visual guide

Organizing attention

Attention: Staying with tasks can take extra effort.
Organization: Planning and finishing everyday tasks may be difficult.
History: Evaluation looks at symptoms from childhood through adult life.

An organized workspace suggests the attention, planning, and daily routines explored in an ADHD evaluation.

What else can look like it

Attention problems that started in adulthood, or that got worse suddenly, almost always have another explanation.

Look-alike	What points to it	How it is checked
Sleep apnea, insomnia	Snoring, waking unrefreshed, daytime sleepiness	Home sleep study, sleep history
Depression and anxiety	Mood change came first, or attention worsens with mood	History
Thyroid disease, vitamin B12 deficiency	Fatigue and other body symptoms alongside	Blood tests
Medication side effects	Symptoms track a new prescription	Medication review
Concussion or head injury	Onset dates to the injury	History, examination
Long COVID brain fog	Began after an infection, with fatigue	History, targeted testing
Early memory loss in older adults	Progressive, and family notice it	Cognitive screening, neuropsychological testing

Treating one of these sometimes resolves the attention problem entirely, which is the main reason to be evaluated by someone who checks them rather than skipping straight to the diagnosis.

How the diagnosis is made

There is no blood test or scan for ADHD. The diagnosis is clinical, and in adults it is harder than in children because the symptoms overlap with so much else.

A detailed history. When symptoms started, how school went, and how they affect work and relationships now. Old report cards or a parent's recollection are genuinely useful.
Rating scales. Standardized questionnaires for you and, where possible, for someone who knows you well.
Medical evaluation. A neurological examination and, when indicated, blood tests to exclude the look-alikes above.
Neuropsychological testing. Not needed for everyone, but valuable when the picture is unclear or a learning disorder is suspected.
Coexisting conditions. Anxiety, depression, and learning disabilities often accompany ADHD and change the plan.

Blank photo frame, work notebook, and clinical clipboard arranged together. — The diagnosis rests on a careful history and consideration of other explanations.

Treatment

Medication. Stimulants are the most studied treatment for adult ADHD and help many patients. Non-stimulant options exist for people who cannot take them, do not tolerate them, or prefer not to use them. Stimulants are controlled substances with specific federal and state prescribing rules. If medication is appropriate after the evaluation, we go through the options with you, and any prescription is paired with monitoring of blood pressure, heart rate, sleep, and side effects.
Skills-based therapy. Cognitive-behavioral therapy adapted for adult ADHD helps with organization, time management, and the accumulated frustration of years of undiagnosed symptoms. We do not provide therapy in our office and will refer you to someone who works with adult ADHD.
Coaching. ADHD coaches work on planning and follow-through week by week, and some patients get more from this than from anything else.
Structure. Consistent routines, one place for calendars and reminders, large tasks broken into defined steps, regular exercise, and protected sleep. These make medication work better rather than replacing it.

What an evaluation here involves

Consider an evaluation if difficulty with attention, organization, or impulse control goes back to childhood and still affects your work or relationships, if self-help strategies have not moved the needle, or if attention problems have started recently, which needs a different workup entirely.

A first visit with Dr. Achillefs Ntranos, MD, a board-certified neurologist, is 60 minutes. That is enough time to take the history back to childhood, go through rating scales, examine you, and look properly at the conditions that mimic ADHD. Blood tests, a home sleep study, or neuropsychological testing follow when they will change the answer. We see patients in Beverly Hills and West Los Angeles and by video anywhere in California, no referral is needed, and you can book a visit directly.