Vernalis and partner Biogen Idec have halted development of the drug vipadenant (V2006/BIIB014), an A2A receptor antagonist program in development for the treatment of Parkinson's. Though the drug turned in positive results in a Phase II study, a review of findings in preclinical toxicology studies raised the possibility of side effects.
Vernalis and Biogen say they will refocus on an earlier-stage A2A pathway candidate, and plan to move that drug into Phase I studies next...