Are Dopamine Deficits Behind Both ADHD and RLS?

PostedSeptember 10, 2025

UpdatedSeptember 12, 2025

ByMy Patient Advice

Author: Victoria Rowe, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Research suggests that dopamine deficits in ADHD RLS may be a shared factor linking attention deficit hyperactivity disorder (ADHD) and restless legs syndrome RLS. Dopamine is a neurotransmitter responsible for regulating movement, attention, motivation, and the brain’s reward system. Disruptions in dopamine pathways are strongly implicated in both conditions, making this neurotransmitter link a central focus of ongoing research.

The Dopamine Connection

In ADHD, dopamine dysfunction is thought to contribute to symptoms like inattention, impulsivity, and difficulty regulating focus. Stimulant medications, which increase dopamine availability, often improve these symptoms.

In RLS, reduced dopamine activity in specific areas of the brain and spinal cord is believed to cause the urge to move the legs, particularly at night. Treatments for RLS often include dopamine agonists, which boost dopamine signalling to relieve symptoms.

Overlapping ADHD RLS Pathology

Both conditions share neurological features:

Sleep Disruption

Dopamine plays a role in regulating the sleep-wake cycle, and deficits may contribute to the insomnia seen in both ADHD and RLS.

Motor Restlessness

Hyperactivity in ADHD and leg movement in RLS may stem from similar dopamine-related pathways.

Why This Matters for Treatment

Understanding dopamine deficits in ADHD RLS could improve diagnosis and lead to treatments that target shared neurobiological roots. For example, iron deficiency is known to reduce dopamine production and has been linked to both ADHD and RLS, suggesting that addressing iron levels may benefit individuals with either or both conditions.

By exploring the neurotransmitter link, researchers hope to develop more effective strategies for managing ADHD RLS pathology and improving quality of life. For more on dopamine deficits ADHD RLS, consider reaching out to providers like ADHD Certify.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Sleep disorders.

Victoria Rowe, MSc

Author

Victoria Rowe is a health psychologist with a Master’s in Health Psychology and a BS in Applied Psychology. She has experience as a school psychologist, conducting behavioural assessments, developing individualized education plans (IEPs), and supporting children’s mental health. Dr. Rowe has contributed to peer-reviewed research on mental health, including studies on anxiety disorders and the impact of COVID-19 on healthcare systems. Skilled in SPSS, Minitab, and academic writing, she is committed to advancing psychological knowledge and promoting well-being through evidence-based practice.

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.