Can Someone Have ADHD Without Hyperactivity? 

Yes, someone can have ADHD inattentive type without exhibiting the typical hyperactive symptoms. This form of ADHD, known as inattentive ADHD, is often characterised by symptoms such as difficulty focusing, forgetfulness, and disorganisation, rather than the classic hyperactivity and impulsivity typically associated with ADHD. People with quiet ADHD may not display the outward signs of hyperactivity, making it more challenging to diagnose, especially in children who are less disruptive. According to NICE Clinical Knowledge Summaries CKS (4) ADHD can be diagnosed without hyperactivity, with inattentive type defined by symptoms such as poor attention to detail, forgetfulness, and disorganisation.  

The Nature of ADHD Inattentive Type 

Inattentive ADHD is one of the three subtypes of ADHD and is primarily marked by difficulties in maintaining focus, following through with tasks, and staying organised. Individuals with this type of ADHD often daydream or become easily distracted, but they do not display the overt restlessness, impulsivity, or hyperactivity seen in other forms of ADHD. This can sometimes lead to the condition going unnoticed, particularly in school settings, as children with inattentive ADHD might not exhibit disruptive behaviours. 

How ADHD Inattentive Type Differs from Hyperactive ADHD 

This is how ADHD inattentive type differs from the hyperactive form: 

Difficulty with Focus and Organisation

Individuals with inattentive ADHD often struggle with tasks that require sustained attention, such as schoolwork or chores, leading to missed details or unfinished tasks. People with inattentive ADHD, unlike those with the hyperactive type, can usually sit still but often become lost in their thoughts, making it difficult to concentrate or complete tasks. 

Quiet ADHD and Social Interaction

In children, quiet ADHD may present as withdrawal or shyness rather than disruptive behaviour, leading to difficulties with social interactions and self-esteem.Children with hyperactive ADHD may draw more attention due to impulsivity and movement, whereas those with the inattentive type may appear passive or disengaged, making their struggles less visible. 

Diagnostic Criteria for Inattentive ADHD

According to the diagnostic criteria, ADHD can be diagnosed even without the presence of hyperactivity. For inattentive ADHD, the main symptoms are difficulty focusing, forgetfulness, and disorganisation, with no significant hyperactive behaviours. Individuals with hyperactive ADHD display both inattention and high energy, whereas those with the inattentive type mainly struggle with attention issues, without restlessness. 

For personal consultations on ADHD inattentive type, visit providers like ADHD Certify. For a deeper dive into the diagnostic criteria for inattentive ADHD and how it differs from hyperactive types, read our complete guide Hyperactivity.