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Could ADHD and fibromyalgia be biologically connected?

NCT ID NCT07443800

Knowledge-focused Sponsor: University Hospital, Tours Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study will check how often people with ADHD also have fibromyalgia, and vice versa. Researchers will collect blood and urine samples from 100 adults to look for shared biological markers. The goal is to better understand why these two conditions often occur together.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could reveal a biological link between ADHD and fibromyalgia, pointing toward better diagnosis or shared treatment approaches.
What could go wrong
This is an early observational study with only 100 participants, so findings may not apply to everyone. It does not test any new treatment.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 100 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Jul 2026

An estimate. Start dates often move.

Expected to finish

Jul 2028

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 100 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: For patients with fibromyalgia : * Men or women aged 18 or over * Diagnosis of fibromyalgia * Affiliated with a social security scheme * Having signed an informed consent form For patients with ADHD treated with methylphenidate * Men or women aged 18 or over * ADHD diagnosis * Current treatment with extended-release methylphenidate for at least 1 month, with stable dosage for at least 2 weeks * Affiliated with a social security scheme * Having signed an informed consent form For patients with ADHD but not treated with methylphenidate * Men or women aged 18 or over * ADHD diagnosis * Affiliated with a social security scheme * Having signed an informed consent form Exclusion Criteria: * For patients with fibromyalgia: existence of another condition explaining chronic pain * Severe cognitive impairment * Difficulties in understanding self-administered questionnaires * Difficulties in assessing pain intensity * Acute psychiatric disorder impacting the validity of self-report questionnaire data collection * Inability to take biological samples * Persons covered by Articles L1121-5 to L1121-8 of the CSP (corresponding to all protected persons: pregnant women, women in labor, nursing mothers, persons deprived of their liberty by judicial or administrative decision, minors, persons subject to legal protection measures: guardianship or curatorship).

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Conditions

The condition(s) this trial relates to.

attention deficit hyperactivity disorder, inattentive type attention deficit-hyperactivity disorder Chronic Pain chronic pain syndrome fibromyalgia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

ADHD - attention deficit disorder with hyperactivity Attention deficit disorder with or without hyperactivity Chronic pain Fibromyalgia (FM)

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  2. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

More trials for these conditions

Other studies related to the condition(s) this trial covers.