ACADIA Pharmaceuticals
ACADIA Pharmaceuticals sponsors 35 registered US clinical trials on ClinicalTrials.gov, 3 of them currently recruiting, and 22 completed. 16 of these trials are in Phase 3-4 (later-stage) and 18 in Phase 1-2 (earlier-stage). The most-studied condition in this pipeline is Parkinson's Disease Psychosis, with 2 trials.
Trial Pipeline
35 total, page 1 of 1
ACP-211 Monotherapy for Major Depressive Disorder With Inadequate Antidepressant Response
NCT07284667
Phase 2, Efficacy and Safety Study of ACP-204 in Lewy Body Dementia Psychosis
NCT07029581
ACP-204 in Adults With Alzheimer's Disease Psychosis
NCT06159673
Study of Carbetocin Nasal Spray for the Treatment of Hyperphagia in Prader-Willi Syndrome
NCT06173531
Extension Study of Pimavanserin in Irritability Associated With Autism Spectrum Disorder
NCT05555615
Pimavanserin for the Treatment of Irritability Associated With Autism Spectrum Disorder
NCT05523895
An Open-Label Study of Trofinetide for the Treatment of Girls Two to Five Years of Age Who Have Rett Syndrome
NCT04988867
Evaluate the Efficacy and Safety of ACP-044 in Subjects With Pain Associated With Osteoarthritis of the Knee
NCT05008835
Evaluate the Efficacy and Safety of ACP-044 for the Treatment of Acute Postoperative Pain Following Bunionectomy
NCT04855240
Open-Label Extension Study of Trofinetide for Rett Syndrome
NCT04776746
Open-Label Study With Pimavanserin on Activities of Daily Living in Subjects With Parkinson's Disease Psychosis
NCT04292223
Open-Label Extension Study of Trofinetide for the Treatment of Girls and Women With Rett Syndrome
NCT04279314
Study of Trofinetide for the Treatment of Girls and Women With Rett Syndrome (LAVENDER™)
NCT04181723
Study to Evaluate Safety and Daytime Sedation in Subjects With Parkinson's Disease With Neuropsychiatric Symptoms Treated With Pimavanserin or Low-Dose Quetiapine
NCT04164758
Extension Study of Pimavanserin in Subjects With Major Depressive Disorder and Inadequate Response to Antidepressant Treatment
NCT04000009
Adjunctive Pimavanserin in Subjects With Major Depressive Disorder and Inadequate Response to Antidepressant Treatment
NCT03968159
Extension Study of Pimavanserin in Adult Subjects With Neuropsychiatric Symptoms Related to Neurodegenerative Disease
NCT03623321
A Safety Study of Pimavanserin in Adult and Elderly Subjects Experiencing Neuropsychiatric Symptoms Related to Neurodegenerative Disease
NCT03575052
Safety and Efficacy of Pimavanserin in Adults With Parkinson's Disease and Depression
NCT03482882
Relapse Prevention Study of Pimavanserin in Dementia-related Psychosis
NCT03325556
The INSYTE (Management of Parkinson's Disease Psychosis in Actual Practice) Study
NCT03152292
A Study of Pimavanserin for the Treatment of Agitation and Aggression in Subjects With Alzheimer's Disease
NCT03118947
Extension Study of Pimavanserin for the Adjunctive Treatment of Schizophrenia
NCT03121586
Study to Evaluate the Efficacy and Safety of Adjunctive Pimavanserin in Major Depressive Disorder (CLARITY)
NCT03018340
Efficacy and Safety of Pimavanserin as Adjunctive Treatment for the Negative Symptoms of Schizophrenia (ADVANCE)
NCT02970305
Study to Examine the Safety and Efficacy of Pimavanserin for the Treatment of Agitation and Aggression in Alzheimer's Disease (SERENE)
NCT02992132
Efficacy and Safety of Adjunctive Pimavanserin for the Treatment of Schizophrenia (ENHANCE-1)
NCT02970292
A Study of the Safety and Efficacy of Pimavanserin in Patients With Parkinson's Disease Psychosis
NCT01174004
A Study of Safety and Efficacy of Pimavanserin (ACP-103) in Patients With Parkinson's Disease Psychosis
NCT00658567
A Study of the Safety and Tolerability of Pimavanserin (ACP-103) in Patients With Parkinson's Disease Psychosis
NCT00550238
A Study of the Safety and Efficacy of Pimavanserin (ACP-103) in Patients With Parkinson's Disease Psychosis
NCT00477672
ACP-104 in Acutely Psychotic Subjects With Schizophrenia
NCT00490516
Antipsychotic and Motor Effects of ACP-103 When Administered in Combination With Haloperidol and Risperidone
NCT00361166
An Open-label Safety Study of Pimavanserin in Parkinson's Disease Patients
NCT01518309
Treatment of Hallucinosis/Psychosis in Parkinson's Disease by an Investigational Drug
NCT00087542
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 2 | 18 |
| Phase 3 | 15 |
| Phase 4 | 1 |
Therapeutic Areas
What the Pipeline for ACADIA Pharmaceuticals Shows
According to the ClinicalTrials.gov registry, ACADIA Pharmaceuticals is linked to 35 US clinical trials across every stage of research activity. Of those, 3 studies are currently recruiting, about 9% of the sponsor's indexed portfolio, and 22 are already marked complete, representing roughly 63% of the total.
The phase mix for ACADIA Pharmaceuticals reports 16 late-stage studies (Phase 3 and Phase 4 combined) and 18 earlier-phase studies (Phase 1 and Phase 2).
The top therapeutic focus area indexed for ACADIA Pharmaceuticals is Parkinson's Disease Psychosis with 2 linked trials, and 9 other condition areas appear in the top list above.
How to read these pipeline numbers
Recruiting share is one of the more practical signals here: it reflects how much of a sponsor's research is presently open to new participants, while the completed share indicates the depth of finished work that has already contributed registry results. Both counts come directly from the public ClinicalTrials.gov dataset and are refreshed on the registry side; this page mirrors the latest data pull without altering it.
A portfolio weighted toward Phase 3 usually reflects an organization advancing candidates toward regulatory review, where the research centers on comparative efficacy and broader safety across larger populations. A heavier Phase 1 and Phase 2 tilt generally indicates exploratory work, safety, dosing, and early signal detection, and is common among research-forward sponsors that seed many early programs. Phase 4 entries, when present, track interventions already in real-world use and typically focus on long-term safety, effectiveness across subgroups, or formulation comparisons.
That distribution is a quick read of where the organization concentrates its research attention; it does not imply product availability, market share, or any clinical endorsement. All numbers on this page come from ClinicalTrials.gov maintained by the National Library of Medicine, and counts can shift as new studies are registered or existing ones update their status. This information is provided for reference and educational purposes only, not as medical, investment, or regulatory advice, verify current details directly with ClinicalTrials.gov before relying on any figure here.
Read our methodology - how this data is sourced, computed, and verified.
Related
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This page aggregates every registered trial from this sponsor, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.