Overview Study of BIA 9-1067 to Investigate Its Effect on Levodopa Pharmacokinetic Status: Completed Trial end date: 2011-06-01 Target enrollment: Participant gender: Summary To investigate the effect of repeated dosing of BIA 9-1067 on the levodopa pharmacokinetics, in comparison to placebo and entacapone. Phase: Phase 1 Details Lead Sponsor: Bial - Portela C S.A.Treatments: CarbidopaEntacaponeLevodopaOpicapone