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The failure of the Phase 3 trial is a significant setback. Historically, similar events have severely impacted biotech stocks, leading to drastic price declines.
What happened, with direct paths to the underlying reporting
Prothena's Phase 3 trial for birtamimab failed primary endpoint. Company will discontinue development of birtamimab following disappointing results. PRTA stock fell 26.80% post-announcement; plans for cost reductions underway. Future data readouts for Alzheimer's drug PRX012 are anticipated within 18 months. Workforce reductions and business evaluations are planned to benefit shareholders.
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