Acadia Pharmaceuticals Inc.’s persistence in adapting the clinical trial design for pimavanserin after an early failure in Parkinson’s disease psychosis has paid off, with assurance from FDA that the single positive Phase III trial the firm has already conducted will be sufficient for filing.
Pimavanserin (ACP-103) is a first-in-class, oral antagonist/inverse agonist of serotonin 5-HT2A receptors wholly owned by Acadia. The firm lost its...