Acadia Parkinson’s Psychosis Drug Doesn’t Worsen Disease: FDA
FDA reviewers say an Acadia Pharmaceuticals pivotal study, which supports an NDA for Nuplazid (pimavanserin) and its use in treating psychosis associated with Parkinson’s Disease (PDP), “established statistical evidence” and does not worsen Parkinson’s Disease status. In a briefing document released in advance of a 3/29 Psychopharmacologic Drugs Advisory Committee meeting, the reviewers say pimavanserin 40 mg has been shown to be more efficacious than placebo for an acute treatment of PDP.
The primary efficacy endpoint in the study was the change from baseline to week six in the SAPS-PD (Scale for the Assessment of Positive Symptoms for Parkinson’s Disease) score. The briefing document notes that the advisory committee will be asked for input on the SAPS-PD instrument and whether the treatment effect observed in this study, “three points in SAPS-PD as an observed effect (a difference of pimavanserin from placebo in least square mean estimate), is clinically meaningful.”