What role do neurotransmitter-related genes play in ADHD?

PostedAugust 18, 2025

UpdatedSeptember 3, 2025

ByMy Patient Advice

Author: Lucia Alvarez, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Neurotransmitters like dopamine and norepinephrine are central to how the brain regulates attention, behaviour, and emotion. Research shows that neurotransmitter genes in ADHD, particularly those involved in how these brain chemicals are produced, transported, and received, play a critical role in the condition’s development. Variants in these genes can disrupt the balance of ADHD brain chemicals, making it harder for the brain to manage focus, impulse control, and emotional regulation.

These genetic differences don’t cause ADHD outright, but they do increase susceptibility, especially when combined with environmental stressors or developmental challenges.

Key neurotransmitter genes involved in ADHD

Scientists have identified several important genes that impact brain chemistry in people with ADHD.

Dopamine transport gene

DAT1, a gene responsible for the reuptake of dopamine in the brain, is one of the most studied in ADHD research. Alterations in this gene can lead to inefficient dopamine regulation, a hallmark of the disorder.

Norepinephrine gene ADHD

The SLC6A2 gene controls norepinephrine transport and plays a role in alertness and stress response. Changes in this gene can affect attention span and impulse control, contributing to core ADHD symptoms.

Receptor and enzyme genes

Genes like DRD4 (a dopamine receptor gene) and COMT (involved in breaking down dopamine) also influence how long neurotransmitters stay active in the brain, further shaping behavioural outcomes.

Understanding the influence of neurotransmitter genes in ADHD helps inform more personalised treatment strategies, such as which medications or behavioural therapies may work best. Visit providers like ADHD Certify to explore options aligned with your child’s neurological profile.

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

Lucia Alvarez, MSc

Author

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

Reviewer

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.