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Do genetic factors differ between ADHD subtypes? 

Posted:    Author:  

Lucia Alvarez, MSc

   Reviewed by:  

Dr. Rebecca Fernandez, MBBS

Yes, emerging research suggests that different ADHD presentations may have partially distinct genetic underpinnings. While all subtypes share overlapping genetic influences, specific ADHD subtypes genes may vary in how they affect attention, impulse control, and hyperactivity. These variations can help explain why one person might struggle mainly with focus, while another displays more physical restlessness or behavioural impulsivity. 

Understanding the genetic distinctions between ADHD subtypes not only improves diagnostic clarity but may also guide more targeted treatment strategies. 

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Genetic distinctions across ADHD types 

Here’s how gene expression may vary by ADHD presentation. 

Inattentive ADHD genes 

Individuals with the inattentive subtype often show differences in genes linked to dopamine regulation and cognitive processing. These inattentive ADHD genes may be associated with slower information processing and difficulties with sustained mental effort. 

Hyperactive type genes 

The hyperactive-impulsive subtype is more commonly associated with variations in genes affecting motor regulation and reward sensitivity. For example, hyperactive type genes may amplify behaviours like fidgeting, impulsive decisions, or excessive talking. 

Combined type genes 

People with the combined subtype may inherit a broader range of genetic risk factors. These combined type genes draw from both inattentive and hyperactive profiles, which may reflect a higher overall genetic load or more complex interactions between multiple neural systems. 

While more studies are needed to fully decode ADHD subtypes genes, the research already points to useful biological differences. Visit providers like ADHD Certify to explore diagnostic options that reflect the specific needs of each ADHD profile. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Genetic Factors in ADHD. 

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Lucia Alvarez, MSc
Written By Lucia Alvarez, MSc

Lucia Alvarez is a clinical psychologist with a Master’s in Clinical Psychology and extensive experience providing evidence-based therapy and psychological assessment to children, adolescents, and adults. Skilled in CBT, DBT, and other therapeutic interventions, she has worked in hospital, community, and residential care settings. Her expertise includes grief counseling, anxiety management, and resilience-building, with a strong focus on creating safe, supportive environments to improve mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 
Dr. Rebecca Fernandez, MBBS
Reviewed By Dr. Rebecca Fernandez, MBBS

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy. 

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