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New pill could quiet restless legs – early trial underway

NCT ID NCT07453862

Symptom relief Sponsor: Beijing Friendship Hospital Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 27, 2026 · Last updated Jun 27, 2026

Summary

This early-stage study is testing a new calcium channel modulator to see if it can ease symptoms of Restless Legs Syndrome (RLS). About 20 adults with moderate-to-severe RLS will take the drug twice a day for 12 weeks. Researchers will measure changes in symptom severity and watch for side effects.

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

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 20 people

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

Expected to start

Mar 2026

An estimate. Start dates often move.

Expected to finish

Aug 2027

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 75 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: * 1\. Aged 18-75 years, regardless of gender. * 2\. Meets the diagnostic criteria for typical Restless Legs Syndrome (RLS) (IRLSSG criteria) or variant RLS confirmed by a neurologist. * 3\. Moderate to severe RLS (IRLS score ≥11). * 4\. Able to understand and comply with the study protocol, and provides written informed consent. Exclusion Criteria: * 1\. Secondary RLS (e.g., iron deficiency anemia with serum ferritin \<30μg/L, renal dysfunction with eGFR \<30ml/min, pregnancy/lactation, drug-induced RLS with unadjustable medications). * 2\. Severe central nervous system diseases (e.g., status epilepticus, severe dementia, stroke within 3 months). * 3\. Severe cardiovascular diseases (e.g., congestive heart failure, uncontrolled hypertension with SBP≥180mmHg or DBP≥110mmHg). * 4\. Severe liver or kidney dysfunction (ALT/AST \>3×ULN, eGFR \<30mL/min/1.73m²). * 5\. Active mental illnesses (e.g., schizophrenia, acute bipolar disorder). * 6\. Hypersensitivity to Keligabalin Benzenesulfonic Acid or its excipients. * 7\. Participation in other clinical trials within 1 month, inability to cooperate with follow-up, or history of substance abuse. * 8\. Pregnancy or lactation.

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Conditions

The condition(s) this trial relates to.

restless legs syndrome

As listed by the trial registrant

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

Restless leg syndrome (RLS) Variant restless legs syndrome

How to take part

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

  1. The places running it

    1 site. The list below names each one and where it is.

  2. 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 ↗

  3. 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.

Contacts and locations

Locations

  • Capital Medical University Affiliated Beijing Friendship Hospital

    RECRUITING

    Beijing, Beijing Municipality, 100050, China

More trials for these conditions

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