Clinical trialNCT04787965CompletedObservational

Opicapone Treatment Initiation Open-Label Study

SponsorNeurocrine BiosciencesEnrollment239Parkinson Disease

View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

This is an observational study to describe the treatment patterns and clinical outcomes observed with use of ONGENTYS as adjunctive treatment to levodopa/carbidopa in Parkinson's disease patients experiencing "off" episodes with motor fluctuations

clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

Olga Klepitskaya, MD, FAAN
Neurocrine Biosciences
Study Director
clinicaltrials.gov ↗

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

6 registered facilities, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States

Neurocrine Clinical Site
Los Gatos, California, United States
Neurocrine Clinical Site
Memphis, Tennessee, United States
Neurocrine Clinical Site
Christiansburg, Virginia, United States
Neurocrine Clinical Site
Norfolk, Virginia, United States
Neurocrine Clinical Site
Auburn, Washington, United States
Neurocrine Clinical Site
Crab Orchard, West Virginia, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

The drug and biological interventions registered on this study, normalized to their RxNorm ingredient where possible.

Opicapone →

Linked drugs open the directory filtered to KOLs working with them.clinicaltrials.gov ↗

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start: 1 Mar 2021
Primary completion: 4 Aug 2022
Completion: 4 Aug 2022
Last update posted: 28 Nov 2022
Registered enrollment: 239
Registry id: NCT04787965

clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.