What are the symptoms of Attention Deficit Hyperactivity Disorder (ADHD) in adults?

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Last updated: April 23, 2025View editorial policy

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From the Guidelines

Adults with ADHD typically exhibit symptoms of inattention, hyperactivity, or impulsivity, with inattentive symptoms being more prevalent, and a diagnosis requires the presence of at least 5 symptoms of inattention and/or hyperactivity-impulsivity for at least 6 months, as outlined in the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition 1. To diagnose adult ADHD, the first step is to have patients complete part A of the Adult ADHD Self-Report Scale (ASRS-V1.1), which asks patients to indicate the frequency of a variety of symptoms, and a screen is positive when a patient checks often or very often for 4 or more of the 6 questions 1. Some key symptoms of adult ADHD include:

  • Poor attention to detail
  • Difficulty concentrating or sustaining attention on tasks
  • Seems preoccupied, difficulty in shifting focus even when spoken to directly
  • Difficulty with completing tasks (gets distracted/side-tracked)
  • Organizational challenges (eg, resulting in chronic lateness—for appointments or deadlines, messiness, disorganized work)
  • Reluctance to engage in tasks that require sustained mental effort (eg, preparing reports, reviewing lengthy papers)
  • Difficulty keeping track of personal belongings/items required for task completion
  • Easily distracted
  • Frequently forgetful These symptoms must cause significant impairment in daily functioning across multiple settings to warrant a diagnosis 1. It's essential to note that many adults with ADHD develop coping mechanisms that mask symptoms, making diagnosis challenging, and treatment typically involves a combination of medication, cognitive behavioral therapy, and lifestyle modifications including organizational strategies, exercise, and adequate sleep 1. If you recognize these symptoms in yourself, consulting with a healthcare provider specializing in adult ADHD is recommended for proper evaluation and treatment.

From the FDA Drug Label

INDICATIONS AND USAGE Dextroamphetamine sulfate tablets are indicated in: ... Attention Deficit Disorder with Hyperactivity: As an integral part of a total treatment program that typically includes other remedial measures (psychological, educational, social) for a stabilizing effect in pediatric patients (ages 3 years to 16 years) with a behavioral syndrome characterized by the following group of developmentally inappropriate symptoms: moderate to severe distractibility, short attention span, hyperactivity, emotional liability, and impulsivity.

The symptoms of Attention Deficit Disorder with Hyperactivity mentioned are:

  • Moderate to severe distractibility
  • Short attention span
  • Hyperactivity
  • Emotional liability
  • Impulsivity However, these symptoms are described for pediatric patients. The FDA drug label does not answer the question.

From the Research

Adult ADHD Symptoms

  • Adult ADHD symptoms can include inattention, hyperactivity, and impulsivity, which can impact daily life and social functions 2
  • Studies have shown that adults with ADHD often have comorbidities with depressive disorders, anxiety disorders, substance use, oppositional defiant disorder, personality disorders, sleep problems, and learning disabilities 2
  • Symptoms of ADHD in adults can be mistaken for comorbid disorders, making diagnosis and treatment challenging 2

Treatment of Adult ADHD

  • Pharmacologic treatments for adult ADHD include stimulants, such as methylphenidate, and non-stimulants, such as atomoxetine 3, 2, 4
  • Methylphenidate has been shown to be effective in reducing ADHD symptoms and improving quality of life in adults with ADHD 3, 4
  • Atomoxetine has also been shown to be effective in reducing ADHD symptoms, particularly hyperactive/impulsive symptoms 3
  • Cognitive behavioral therapy (CBT) has been shown to be an effective treatment for adults with ADHD, and can be used alone or in combination with medication 5

Efficacy of Treatments

  • Studies have compared the efficacy of different treatments for adult ADHD, including methylphenidate, atomoxetine, and CBT 3, 4, 5
  • Methylphenidate and atomoxetine have been shown to be effective in reducing ADHD symptoms, with methylphenidate being more effective in some studies 3, 4
  • CBT has been shown to be effective in improving core ADHD symptoms, emotional symptoms, and social functional outcomes, and can be used alone or in combination with medication 5

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.

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