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Placebo-Controlled Double-Blind Crossover Comparative Study of KW-6500 (6500-004)

Phase 3 Study of KW-6500 (Placebo-Controlled Double-Blind Crossover Comparative Study in Patients with Parkinson's Disease)

Status
Unknown
Phases
Phase 3
Study type
Interventional
Source
JPRN
Registry ID
JPRN-jRCT2080220980
Enrollment
20
Registered
2010-01-27
Start date
2010-01-27
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Parkinson's Disease

Interventions

Sponsors

Kyowa Hakko Kirin Co., Ltd.
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: - Patients who have given written informed consent - Patients who have Parkinson's disease - Patients who have been on a stable regimen of levodopa plus at least one other antiparkinsonian agent and who have OFF state - Patients who meet stage 4 or 5 while in the OFF state and stage 0 to 3 while in the ON state on the Modified Hoehn and Yahr Scale - Patients who have experienced a 30% or more improvement in Unified Parkinson's Disease Rating Scale (UPDRS) part III score when tested for responsiveness to levodopa during the baseline period - Patients who have at least one OFF state per day - Patients who can understand the expression of OFF state, ON state, and dyskinesia - Patients or their families have a desire for self-injection of KW-6500

Exclusion criteria

Exclusion criteria: - Patients with an illness of the cardiac, hematologic, hepatic, renal, pancreatic, metabolic, respiratory, gastrointestinal, endocrinologic, or neurologic system (excluding Parkinson's disease) - Patients with orthostatic hypotension - Patients with a history of intolerance to morphine or its derivatives, sulfur, sulfur-containing pharmaceutical products, or sulfite - Patients with a history of malignant syndrome - Patients with a diagnosis of cancer or evidence of continued disease - Patients who do not test negative in the direct Coombs' test - Pregnant or lactating women, women who are planning to have children, women who test positive in the pregnancy test, or women who cannot adhere to a reliable method of contraception - Patients who have received MAO inhibitors except selegiline - Patients with a history of mental disease (excluding psychiatric symptoms associated with Parkinson's disease) - Patients with a Mini-Mental State Examination score of 23 or less - Patients who are taking antipsychotics or central dopamine antagonists (excluding domperidone) - Patients who are receiving methyldopa or 5-HT3 receptor antagonists - Patients who are receiving reserpine or papaverine - Patients who have had a neurosurgical operation for Parkinson's disease - Patients who have had transcranial magnetic stimulation - Patients with a history of drug or alcohol abuse or dependence

Design outcomes

Primary

MeasureTime frame
The raw score change in UPDRS part III score at the double blind period

Secondary

MeasureTime frame
The percent score change in UPDRS Part III score and response ratio at the double blind period

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026