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CompletedNCT009572036002-010Updated Aug 31, 2012

Long-Term Safety Study of KW-6002 (Istradefylline) in Parkinson's Disease Patients

A Phase 3 interventional study of Istradefylline in Parkinson's Disease, sponsored by Kyowa Kirin Co., Ltd.. Completed at 1 site in Japan. Open to participants aged 20 Years and older. Per ClinicalTrials.gov, last updated 2012-08-31.

Sponsored by Kyowa Kirin Co., Ltd. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
308
Allocation
Not applicable
Ages
20 Years and older
Sex
All
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Study summary

Patients with Parkinson's disease who completed the prior double-blind study 6002-009 are eligible to enter into this long-term study. The purpose of this study is to evaluate the safety and efficacy of KW-6002 administered long-term in patients with advanced Parkinson's disease treated with levodopa.

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Conditions studied

  • Parkinson's Disease

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Keywords

  • Parkinson's disease
  • levodopa
  • end of dose wearing off
  • OFF time
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In context

Parkinson Disease

4,487 studies on the registry are indexed under Parkinson Disease; 1,082 are open to participants now.

This study's enrollment of 308 is above the median of 40 across 3,294 interventional studies indexed under Parkinson Disease.

Browse Parkinson Disease studies →

Lead sponsor

Kyowa Kirin Co., Ltd. is the lead sponsor of 155 studies on the registry; 10 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
20 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  1. Be willing and able to give written informed consent
  2. Completion of the study 6002-009

Exclusion criteria

Exclusion Criteria:

  1. Mini-mental status examination score of 23 or less
  2. Less than 70% of compliance in the study 6002-009
  3. Emergency deviation in the study 6002-009
  4. Pregnant females
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Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
308 participants (actual)

Study arms

  • Experimental
    Istradefylline

    Drug: Istradefylline

Interventions

  • DrugIstradefylline

    Oral istradefylline (KW-6002) 20 or 40 mg once daily

    Also known as: KW-6002

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What researchers measure

Primary outcomes

  1. Adverse events

Secondary outcomes

  1. Reducing the mean total hours of awake time per day spent in the OFF state

  2. Reducing the mean percentage of awake time per day spent in the OFF state

  3. Mean change in the total hours and the percentage of awake time per day spent in the ON state (without dyskinesia, with dyskinesia, with non-troublesome dyskinesia, and with troublesome dyskinesia)

  4. Change in Unified Parkinson's Disease Rating Scale (UPDRS)

  5. Change in the Clinical Global Impression - Improvement scale (CGI-I)

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Study locations

1 site
  • Tokyo, Japan
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 31, 2012, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT00957203
Lead sponsor
Kyowa Kirin Co., Ltd.
Responsible party
Sponsor
First posted
Aug 12, 2009
Start date
Oct 2009
Primary completion
Sep 2011
Completion
Mar 2012
Last update
Aug 31, 2012

Study contacts

Study Director
study director · Kyowa Kirin Co., Ltd.

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Aug 2012. You cannot join it, but the record below documents what was studied.

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