TerminatedPhase 2/3

Dipraglurant (ADX48621) for the Treatment of Patients With Parkinson's Disease Receiving Levodopa-based Therapy

Stopped: Terminated prior to completing enrollment goals due to COVID-related difficulties in recruiting patients

United States25 participantsStarted 2021-08-06

Plain-language summary

This study is designed to evaluate the safety and efficacy of dipraglurant in PD patients with dyskinesia (randomized 1:1 to receive active or placebo) for 12 weeks (1 week at 150 mg per day and 11 weeks at 300 mg per day). The primary efficacy assessment will be based on the Unified Dyskinesia Rating Scale (UDysRS). Patients who complete the 12-week blinded treatment period may have the option to roll into an open-label safety extension study for an additional 12-month treatment period.

Who can participate

Age range30 Years – 85 Years

SexALL

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Inclusion Criteria: * Patients with Parkinson's Disease on a stable regimen of antiparkinson's medications, including a levodopa preparation administered not less than 3 times daily. * Meet protocol-specified criteria for moderate to severe dyskinesia symptoms based on UDysRS and Movement Disorder Society - Unified Parkinson's Disease Rating Scale (MDS-UPDRS) assessments. * Meet protocol specified criteria for ON time with troublesome dyskinesia based on a standard PD home diary. Exclusion Criteria: * Prior surgical treatment for Parkinson's Disease (e.g., deep brain stimulation). * Other neurological disease (including psychiatric disease and/or cognitive impairment) that, in the opinion of the investigator, would affect the patient's ability to complete study assessments. * Other significant medical condition that may affect the safety of the patient or preclude adequate participation in the study. * Pregnant or breast-feeding. Female patients who are of child-bearing potential must be using adequate contraceptive methods (e.g. oral contraceptive, double-barrier method, intra-uterine device, intra-muscular hormonal contraceptive), and have a negative pregnancy test at Screening. Other protocol-defined inclusion and exclusion criteria may apply

What they're measuring

Change from baseline on the Unified Dyskinesia Rating Scale (UDysRS) total score

Timeframe: Baseline (Day 1) to Week 12

Trial details

NCT IDNCT04857359

SponsorAddex Pharma S.A.

Sponsor typeINDUSTRY

Study typeINTERVENTIONAL

Primary completion2022-06-17