12-Week, Double-Blind, Placebo-Controlled Study of 20 and 60 mg/Day Istradefylline in Parkinson's Disease Patients on Levodopa/Carbodopa
Public ClinicalTrials.gov record NCT00456794. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
A 12-Week, Double-Blind, Placebo-Controlled, Randomized, Multicenter Study of the Efficacy of Doses of 20 and 60 mg/Day Istradefylline as Treatment for Parkinson's Disease in Patients With Motor Response Complications on Levodopa/Carbidopa
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
A 12-week, multicenter, double-blind, randomized study designed to evaluate the safety and efficacy of 20 and 60 mg/day istradefylline compared with placebo in subjects with OFF-time phenomena and advanced Parkinson's disease treated with levodopa/carbidopa.
Study identification
- NCT ID
- NCT00456794
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Phase 2
- Enrollment
- 325 participants
Conditions and interventions
Conditions
Eligibility (public fields only)
- Age range
- 30 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Feb 28, 2002
- Primary completion
- Sep 30, 2003
- Completion
- Sep 30, 2003
- Last update posted
- Apr 24, 2024
2002 – 2003
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Contact Kyowa Pharmaceutical, Inc. | Princeton | New Jersey | 08540 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT00456794, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Apr 24, 2024 · Synced Sep 3, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT00456794 live on ClinicalTrials.gov.