Conditions: Parkinson Disease
Keywords: Ropinirole, advanced Parkinson's disease, L-dopa adjunctive therapy
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 302
Healthy volunteers: no

Brief summary:
To investigate the efficacy and the safety of ropinirole PR/XR tablets to ropinirole immediate release (IR) tablets with advanced Parkinson's disease in conjunction with L-dopa in a double-blind, parallel group comparison study.

Detailed description:

Arms:
arm 1: None arm 2: None

Interventions: intervention 1: ropinirole PR/XR intervention 2: ropinirole IR
Intervention descriptions: intervention 1: Double-blind non-inferiority verification phase (24 weeks) At the baseline visit (Week 0), subjects who completed screening period will be randomised (1:1) to double-blind treatment with either ropinirole PR-PR group or ropinirole IR-PR group.

The subjects'dose will be titrated according to the recommended schedule to achieve an optimal therapeutic response (ropinirolePR/XR2-15 mg/day ,ropinirolIR0.75-15 mg/day).

Double-blind PR/XR switching phase (8 weeks) Ropinirole IR-PR subjects will be switched overnight to a similar dose of ropinirole PR/XR, while the remaining ropinirole PR-PR group will continue on the same dosage.

Double blind long-term treatment phase (22 weeks) The same dose level at the end of PR/XR switching phase will be continued till week 54 under blind.

Down titration phase Subjects who complete Week 54 or withdrawn will be down titrated over a 1 to 4 weeks period. intervention 2: Double-blind non-inferiority verification phase (24 weeks) At the baseline visit (Week 0), subjects who completed screening period will be randomised (1:1) to double-blind treatment with either ropinirole PR-PR group or ropinirole IR-PR group.

The subjects'dose will be titrated according to the recommended schedule to achieve an optimal therapeutic response (ropinirolePR/XR2-15 mg/day ,ropinirolIR0.75-15 mg/day).

Double-blind PR/XR switching phase (8 weeks) Ropinirole IR-PR subjects will be switched overnight to a similar dose of ropinirole PR/XR, while the remaining ropinirole PR-PR group will continue on the same dosage.

Double blind long-term treatment phase (22 weeks) The same dose level at the end of PR/XR switching phase will be continued till week 54 under blind.

Down titration phase Subjects who complete Week 54 or withdrawn will be down titrated over a 1 to 4 weeks period.

Protocol document: