Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT00199420 · ClinicalTrials.gov registry record · Phase 3
A Study of Istradefylline (KW-6002) in Treating Patients With Parkinson's Disease on Levodopa
A Phase 3 study, sponsored by Kyowa Kirin.
- Completed
- Registry status
- Phase 3
- Development phase
- 580
- Enrollment target
NCT00199420: Completed Phase 3 study, sponsored by Kyowa Kirin.
NCT00199420 is a Phase 3 study that has completed, run by Kyowa Kirin. The registered enrollment target is 580 participants, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (25% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00199420, a Phase 3 study, has completed, sponsored by Kyowa Kirin.
- COMPLETED
- Registry status
- Phase 3
- Development phase
- 580 participants
- Enrollment target
Study Summary
To establish the efficacy of 10, 20 and 40 mg/d dose of istradefylline for reducing the percentage of OFF time in patients with advanced Parkinson's disease (PD) treated with levodopa.
Interventions
- DRUG Istradefylline (KW-6002)
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 580 participants |
| Start Date | 2004-07 |
| Est. Completion | 2005-12 |
| Phase | Phase 3 |
What the finished NCT00199420 record still lists
NCT00199420 is an interventional study that assigns participants to a tested intervention. The registered 580 participants enrollment target is mid-sized for trials with a published cap, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (25% lower).
The record links to 0 conditions, and to 1 intervention - of which Istradefylline (KW-6002) is the first listed.
NCT00199420 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00199420 about?
NCT00199420 is a clinical study titled "A Study of Istradefylline (KW-6002) in Treating Patients With Parkinson's Disease on Levodopa". To establish the efficacy of 10, 20 and 40 mg/d dose of istradefylline for reducing the percentage of OFF time in patients with advanced Parkinson's disease (PD) treated with levodopa.
What is the current status of trial NCT00199420?
This trial is currently completed. It is a Phase 3 study. The enrollment target is 580 participants. The study started on 2004-07. Estimated completion is 2005-12.
What interventions are being tested in trial NCT00199420?
The interventions under investigation include: Istradefylline (KW-6002) (DRUG).
Who is sponsoring clinical trial NCT00199420?
This trial is sponsored by Kyowa Kirin, which has 34 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00199420's enrollment target sits among peer trials
580 656th of 2000 higher than 1,342 of 2,000 other Phase 3 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 3 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT04575935 · 580 participants · Phase 3
Minimally Invasive Surgery After Neoadjuvant Chemotherapy for the Treatment of Stage IIIC-IV Ovarian, Primary Peritoneal, or Fallopian Tube Cancer, LANCE Trial
- NCT05143177 · 580 participants · Phase 2
A Study to Evaluate the Efficacy and Safety of DA-1229 (Evogliptin) in Patient's Calcific Aortic Valve Disease With Mild to Moderate Aortic Stenosis (EVOID-AS)
- NCT05696353 · 580 participants · Phase 3
Teen Driving Translation Study (NIH)
- NCT06578104 · 580 participants
PULSED AF Post-Approval Study
Similar registry start date
- NCT05988463 · started 2027-01-01 · Phase 1
Dose-Escalation Study of Artesunate Patients With IPF
- NCT07219706 · started 2026-12-10 · NA
Dietary Fiber and Time Restricted Eating
- NCT02831335 · started 2026-12-01
Technical Development of Multi-Parametric Renocerebral MRI
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia