FierceBiotech reported today about a failed Phase III trial of Acadia's Pimavanserin in a study of Parkinson's Disease Psychosis (sometimes abbreviated as "PDP"):
ACADIA Pharmaceuticals Announces Results from Phase III Trial of Pimavanserin in Parkinson's Disease Psychosis
Pimavanserin Misses Primary Endpoint of Antipsychotic Efficacy; Meets Key Secondary Endpoint of Motoric Tolerability
SAN DIEGO -- Sep. 1, 2009-- ACADIA Pharmaceuticals Inc. (Nasdaq: ACAD) today announced top-line results from the first pivotal Phase III trial with pimavanserin in patients with Parkinson's disease psychosis, or PDP. The study did not meet its primary endpoint of antipsychotic efficacy as measured using the Scale for the Assessment of Positive Symptoms, or SAPS. Pimavanserin met the key secondary endpoint of motoric tolerability as measured using the Unified Parkinson's Disease Rating Scale, or UPDRS. Pimavanserin was safe and well tolerated, with the frequency of adverse events generally similar in the pimavanserin and placebo arms.
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NOTE: Pimavanserin is a 5-HT2A receptor inverse agonist.