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Study identifier: NCT05116813 Synced from ClinicalTrials.gov · August 10, 2026
● Study status: Terminated

Open-label Safety Study of Dipraglurant (ADX48621) in Patients With Parkinson's Disease Receiving Levodopa-based Therapy

Condition: Parkinson Disease · Dyskinesia, Drug-Induced · Dyskinesias  ·  Sponsor: Addex Pharma S.A.

PhasePhase 2/Phase 3
Planned participants17
Who can joinAll sexes, 30 Years to 85 Years
Healthy volunteersNoCheck eligibility criteria ↓
Where7 locations
For sponsors, CROs & site teams
Professional view of this study — listed sites, countries and recruiting context from the public registry. Everything below is written for patients and caregivers.Open the site landscape →

About this study

This open-label study is designed to assess the long-term safety and tolerability of dipraglurant in PD patients for up to 52 weeks (at doses of 150-300 mg per day) for patients that have completed an Addex sponsored double-blind clinical trial of dipraglurant.

This description comes directly from the study's public registry record.

Talk to the study team

No contact information is available for this study as per the public registry record.

Always discuss trial participation with your own doctor first.

Full eligibility criteria (exactly as the study team wrote them)

Inclusion Criteria: * Completed an Addex randomized controlled study of dipraglurant and, in the judgement of the Investigator, may benefit from open-label treatment * Able to take study drug 3 times daily and no less than 3 hours apart * Must be taking levodopa not less than 3 times daily throughout the study * Must maintain stable regimen of antiparkinson's medications (including levodopa) and be willing to continue the same doses and regimens for the first 4 weeks of the study Exclusion Criteria: * Patient is judged by the Investigator to be inappropriate for the study (for reasons such as, but not limited to, significant noncompliance in the Addex randomized controlled study of dipraglurant) * Use of amantadine or amantadine ER throughout the study * Use of memantine throughout the study * Any use of marijuana or other cannabis/cannabinoid products for the first 4 weeks of study participation Other protocol-defined inclusion and exclusion criteria may apply

Reproduced word-for-word from the public registry record — the study team can answer questions about it.

Locations (7)

Augusta UniversityAugusta, Georgia, United States
University of Kansas Medical CenterKansas City, Kansas, United States
Rutgers, the State University of New JerseyNew Brunswick, New Jersey, United States
Icahn School of Medicine at Mount SinaiNew York, New York, United States
The Ohio State University Wexner Medical CenterColumbus, Ohio, United States
Abington Neurologic AssociatesAbington, Pennsylvania, United States
University of PennsylvaniaPhiladelphia, Pennsylvania, United States

More studies in these areas

This study lists sites in the areas below. Each link shows other recruiting studies near that city, from the public registry record.

AugustaKansas CityNew BrunswickNew York

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