SAN DIEGO--(BUSINESS WIRE)--Acadia Pharmaceuticals Inc. (Nasdaq: ACAD) today announced top-line results from the Phase 3 ADVANCE-2 trial evaluating pimavanserin for the treatment of negative symptoms of schizophrenia. Pimavanserin did not demonstrate a statistically significant improvement over placebo on the study’s primary endpoint, the change from baseline to week 26 on the Negative Symptom Assessment-16 (NSA-16) total score (-11.8 vs. -11.1; p=0.4825; effect size=0.07). The safety and tolerability profi ...