Conditions: Parkinson Disease
Keywords: Ropinirole Parkinson's disease
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 81
Healthy volunteers: no

Brief summary:
This study is a Phase III, multicentre, randomized, initial double-blind study with subsequent open label phases. The study will havea screening phase (4 weeks), a dose increase effect verification phase (12 weeks), a down titration 1 phase (1 week), a long-term phase (39 weeks), down titration 2 phase (1 to 2 weeks) and a follow up phase. Subjects will be assigned to Ropinirole CR high-dose group or Ropinirole CR maintenance group at a ratio of 3:1. This study is being conducted to evaluate the efficacy (effect of increasing Ropinirole dose from 16 mg/day to 18-24 mg/day) of the Ropinirole CR tablets in early and advanced PD patients who have not achieved an optimal therapeutic response with marketed Ropinirole Immediate release (IR) (15 mg/day) or marketed Ropinirole CR (16 mg/day) formulations.

Detailed description:

Arms:
arm 1: The subjects will receive Ropinirole CR 16mg/day for 4 weeks in screening phase. After randomization the subject will enter dose increase effect verification phase, where Ropinirole CR dose will titrated (2 mg /day/week) from 18 mg/day up to a maximum 24mg/day at intervals of 1 week or longer for 8 weeks, till subject reaches a dose level above which further symptomatic improvement cannot be expected; the subject will be maintained on that dose for 4 weeks. This will be followed by a down titration phase of one week and long term phase of 39 weeks in which the subjects will receive incremental doses (2 mg /day/week) of Ropinirole CR from 18 mg/day till to a maximum of 24 mg/day till subject reaches a dose level above which further symptomatic improvement cannot be expected; the subject will be maintained on that dose. Subjects completing the long term phase will undergo a down titration phase of 1 to 2 weeks. arm 2: The subjects will receive Ropinirole CR 16mg/day for 4 weeks in screening phase. After randomization the subject will enter dose increase effect verification phase and Ropinirole CR dose will maintained at 16mg/day and placebo will be increased at intervals of 1 week for 8 weeks till subject reaches a dose level above which further symptomatic improvement cannot be expected; the subject will be maintained on that dose for 4 weeks. This will be followed by a down titration phase of one week and long term phase of 39 weeks in which the subjects will receive incremental doses (2 mg/day/week) of Ropinirole CR from 18 mg/day till to a maximum of 24 mg/day till subject reaches a dose level above which further symptomatic improvement cannot be expected; the subject will be maintained on that dose. Subjects completing the long term phase will undergo a down titration phase of 1 to 2 weeks.

Interventions: intervention 1: Ropinirole CR 2mg tablet intervention 2: Ropinirole CR 8mg tablet intervention 3: Ropinirole CR matching Placebo tablet
Intervention descriptions: intervention 1: Ropinirole CR 2mg tablets will be supplied as white oval film-coated tablets. intervention 2: Ropinirole CR 8mg tablets will be supplied as white oval film-coated tablets. intervention 3: Ropinirole CR matching Placebo tablet tablets (containing no active ingredients) indistinguishable in appearance from Ropinirole CR 2 mg tablets.

Protocol document: