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Study identifier: NCT06159673 Synced from ClinicalTrials.gov · July 28, 2026
● Recruiting

ACP-204 in Adults With Alzheimer's Disease Psychosis

Condition: Alzheimer's Disease Psychosis  ·  Sponsor: ACADIA Pharmaceuticals Inc.

PhasePhase 2/Phase 3
Planned participants1074
Who can joinAll sexes, 55 Years to 95 Years
Healthy volunteersNo

About this study

This is a master protocol for 3 independent, seamlessly enrolling, multicenter, randomized, double-blind, placebo-controlled, parallel-group studies in patients with ADP * Substudy 1 (Phase 2) will evaluate efficacy and dose response of ACP-204 30 and 60 mg vs placebo. This substudy will be initiated first. * Substudies 2A and 2B (both: Phase 3) will be confirmatory studies of either both doses (ACP-204 30 and 60 mg, respectively) or a single dose from Part 1 vs placebo. Substudies 2A and 2B will be performed independently of each other and will commence after enrollment of Part 1. All 3 substudies will be analyzed independently of each other. Each substudy individually will consist of a screening period (up to 49 days); a double-blind treatment period (6 weeks); a safety follow-up period (30 days) for patients not rolling over into an open-label extension study; and vital status follow-up (for patients who terminated their substudy early).

This description comes directly from the study's public registry record.

Talk to the study team

Christine Murphy  ·  858-465-7480  ·  cmurphy@acadia-pharm.com

Kristen White  ·  813-838-6468  ·  kristen.white@acadia-pharm.com

Always discuss trial participation with your own doctor first.

Locations (148)

Chandler Clinical TrialsChandler, Arizona, United StatesRecruiting
Clinical Endpoint LLCScottsdale, Arizona, United StatesRecruiting
Advanced Research Center, Inc.Anaheim, California, United StatesWithdrawn
ATP Clinical ResearchCosta Mesa, California, United StatesRecruiting
Neuro-Pain Medical CenterFresno, California, United StatesRecruiting
National Institute of Clinical ResearchGarden Grove, California, United StatesTerminated
Humanity Clinical Research CorpAventura, Florida, United StatesRecruiting
Arrow Clinical TrialsDaytona Beach, Florida, United StatesRecruiting
First Excellent Research GroupDoral, Florida, United StatesRecruiting
New Life Medical Research Center Inc.Hialeah, Florida, United StatesRecruiting
Reliable Clinical Research LLC.Hialeah, Florida, United StatesRecruiting
Homestead Associates in Research Inc.Miami, Florida, United StatesRecruiting

+ 136 more locations — full list on the registry record.

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Source record: clinicaltrials.gov/study/NCT06159673