ADHD in Adults: Symptoms, Diagnosis, and Treatment

Attention-deficit/hyperactivity disorder, or ADHD, is often associated with children and teenagers, but it's important to recognize that it can persist into adulthood. In fact, it's estimated that 4.4% of adults in the United States have ADHD, though many of them may not realize it. Understanding the symptoms, diagnosis, and treatment options for ADHD in adults is crucial for those who may be struggling with the condition.

Symptoms of ADHD in Adults

The symptoms of ADHD in adults are similar to those in children, but they may manifest in different ways. The three main symptoms of ADHD are inattention, hyperactivity, and impulsivity.

Inattention can manifest in adults as difficulty with organization, forgetfulness, procrastination, and difficulty completing tasks. Adults with ADHD may also have trouble with attention to detail, losing things, and being easily distracted.

Hyperactivity in adults with ADHD can present as restlessness, fidgeting, and difficulty sitting still. They may also feel an internal sense of restlessness and struggle to relax or unwind.

Impulsivity can manifest as interrupting others, blurting out answers, and difficulty waiting their turn. Adults with ADHD may also engage in impulsive behaviours such as overspending, overeating, and substance abuse.

Diagnosis of ADHD in Adults

Diagnosing ADHD in adults can be a challenging process, as many of the symptoms can be attributed to other conditions such as anxiety, depression and cPTSD. Additionally, many adults with ADHD have developed coping mechanisms to manage their symptoms, making them more difficult to identify. In other-words, many adults ‘mask’ their ADHD symptoms - this is especially prevalent in women.

The diagnostic process typically involves a comprehensive evaluation that includes a review of medical history, symptoms, and family history. There may also be assessments of attention, memory, and executive function. A diagnosis of ADHD in adults requires evidence of symptoms that have persisted since childhood, and that impair daily functioning.

Treatment Options for ADHD in Adults

Treatment for ADHD in adults typically involves a combination of medication and therapy. Medications such as stimulants can help to reduce symptoms of inattention and hyperactivity, but they may not be appropriate for everyone. Some people may experience side effects or may have medical conditions that make them ineligible for stimulant medication. Other medications, such as non-stimulant options, may be considered as an alternative.

Therapy can also be an effective treatment for ADHD in adults. Cognitive-behavioural therapy (CBT) can help individuals to develop coping mechanisms for their symptoms and improve executive function. This may involve developing strategies for organization, time management, and goal-setting. CBT can also help individuals to manage the emotional challenges that can accompany ADHD, such as frustration and self-doubt.

Additionally, lifestyle modifications can be beneficial for managing ADHD symptoms. Regular exercise, a healthy diet, and good sleep hygiene can all improve overall functioning and reduce symptoms. It can also be helpful to develop routines and establish consistent habits.

Stimuli offers professionally guided self-help CBT-based therapy.


ADHD is a complex and often misunderstood condition, but recognizing and treating it is crucial for those who may be struggling with its symptoms. Adults with ADHD can benefit from a comprehensive evaluation and diagnosis, followed by a tailored treatment plan that may include medication, therapy, and lifestyle modifications. With the right support, adults with ADHD can learn to manage their symptoms and lead fulfilling lives.