Biohaven achieves positive topline results in pivotal study of troriluzole in spinocerebellar ataxia

SCA is a rare, progressively debilitating neurodegenerative disease that affects approximately 15,000 people in the United States and 24,000 in Europe and the United Kingdom. There are no FDA approved treatments for SCA.

Collectively, data across multiple analyses demonstrate a robust and clinically meaningful slowing of disease progression in SCA patients. These treatment benefits translate into a 50-70% slower rate of decline compared to untreated patients, representing 1.5-2.2 years delay in disease progression over the 3-year study period. Additionally, in a responder sensitivity analysis, disease progression when defined by a 2 point or greater worsening on the f-SARA at 3 years showed an odds ratio (OR) of 4.1 (95% CI: 2.1, 8.1) for the untreated external control arm versus troriluzole treated subjects (p < 0.0001; pooled analysis).

Based upon the topline data from Study BHV4157-206-RWE, and previous safety and efficacy data from the troriluzole development program in SCA, Biohaven plans to submit a New Drug Application (NDA) to the FDA in Q4 2024. The troriluzole development program has generated the largest clinical trial dataset in SCA and now has follow-up in some patients treated with troriluzole for over 5 years.  Biohaven has previously received both Fast-Track and Orphan drug designation (ODD) from the FDA, and ODD from the European Medicines Agency, for troriluzole in SCA. An NDA with ODD is eligible for priority FDA review. Biohaven will be prepared to commercialize SCA in the US in 2025, if ultimately approved, based on potential priority review timelines.