Objective: To evaluate the incidence of treatment-emergent adverse events (TEAEs) in levodopa-treated Parkinson’s Disease (PD) patients with motor fluctuations and taking opicapone (OPC).

Background: OPC is a once-daily COMT inhibitor that proved effective in the treatment of motor fluctuations in PD patients in two large, pivotal, multinational trials (BIPARK-I and II) [1],[2].

Method: Patient-level data from matching treatment arms in BIPARK-I and II were combined in placebo (PLC) and OPC-50mg groups. The studies had similar designs (primary efficacy endpoint: change from baseline in patient diaries-based absolute OFF-time) and eligibility criteria [1],[2]. Safety was assessed by incidence of TEAEs, laboratory parameters, ECGs and vital signs. An exploratory post-hoc analysis was performed to evaluate the incidence of TEAEs according to race (Caucasian vs Asian).

Results: Of the 1027 patients randomized to BIPARK-I and II, 522 patients took a dose of relevant study medication (OPC-50mg n=265, PLC n=257) and were included in this analysis. Caucasian patients represented ~85% of both OPC-50mg and PLC groups. Overall, 64.2% of OPC-50mg patients reported any TEAE compared to 57.2% in PLC. There was a comparable-to-overall incidence of TEAEs for Caucasian-matched patients (65.8% vs. 58.3% for OPC-50mg and PLC groups). In contrast, for Asian-matched patients, the incidence of TEAEs was lower in OPC treated patients (51.5%) than PLC-treated ones (52.4%). The most frequently occurring TEAE was dyskinesia in both subgroups.

Conclusion: Opicapone appears to be well-tolerated in both Caucasian and Asian patients.

References: [1] Ferreira et al., Lancet Neurology 2016; 15(2):154-165. [2] Lees et al., JAMA Neurol. 2017; 74(2):197-206.

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MDS Abstracts - https://www.mdsabstracts.org/abstract/incidence-of-treatment-emergent-adverse-events-in-parkinsons-disease-patients-according-to-race-post-hoc-analysis-from-double-blind-combined-bipark-i-and-ii-data/