A second candidate drug for Parkinson’s disease has failed to meet the primary endpoint in a clinical study of patients with early-stage disease. The Roche Group announced the results of its Phase 2b PADOVA study on 19 December, only days after UCB SA said its medication for early Parkinson’s disease had failed to show efficacy. Roche said it will continue to evaluate data from the main trial and an ongoing extension study in deciding what to do. The candidate drug, prasinezumab, is a monoclonal antibody designed to bind to alpha-synuclein protein and reduce neuronal toxicity.