Independent directory Public ClinicalTrials.gov records United States
Clear filters
ClinicalTrials.gov public records Last synced Sep 24, 2026, 1:49 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–11 of 11 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Conditions
Irritability Associated With Autism Spectrum Disorder
Interventions
Pimavanserin
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
5 Years to 18 Years
Enrollment
209 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
18
States / cities
Phoenix, Arizona • Glendale, California • San Rafael, California + 15 more
Conditions
Schizophrenia
Interventions
Pimavanserin, Placebo
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
403 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
33
States / cities
Phoenix, Arizona • Rogers, Arkansas • Bellflower, California + 27 more
Conditions
Irritability Associated With Autism Spectrum Disorder
Interventions
Pimavanserin, Placebo
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
5 Years to 17 Years
Enrollment
237 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
18
States / cities
Phoenix, Arizona • Glendale, California • San Rafael, California + 15 more
Conditions
Agitation and Aggression in Alzheimer's Disease
Interventions
Pimavanserin
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
50 Years and older
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
17
States / cities
Costa Mesa, California • Fresno, California • Fullerton, California + 14 more
Conditions
Neuropsychiatric Symptoms Related to Neurodegenerative Disease
Interventions
Pimavanserin
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
60 Years and older
Enrollment
595 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
17
States / cities
Gilbert, Arizona • Costa Mesa, California • Santa Ana, California + 9 more
Conditions
Parkinson's Disease Psychosis
Interventions
Pimavanserin tartrate (ACP-103)
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
40 Years and older
Enrollment
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
26
States / cities
La Habra, California • Laguna Hills, California • Reseda, California + 22 more
Conditions
Schizophrenia
Interventions
Pimavanserin, Placebo
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
396 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
33
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Rogers, Arkansas + 27 more
Conditions
Agitation and Aggression in Alzheimer's Disease
Interventions
Pimavanserin 34 mg, Pimavanserin 20 mg, Placebo
Drug · Other
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
50 Years and older
Enrollment
111 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
33
States / cities
Costa Mesa, California • Fresno, California • Fullerton, California + 30 more
Conditions
Dementia-related Psychosis
Interventions
Placebo, Pimavanserin 34 mg, Pimavanserin 20 mg
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
50 Years to 90 Years
Enrollment
392 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
27
States / cities
Costa Mesa, California • Fullerton, California • Aventura, Florida + 22 more
Conditions
Schizophrenia
Interventions
Pimavanserin
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
18 Years and older
Enrollment
995 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
32
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Rogers, Arkansas + 27 more
Conditions
Parkinson's Disease Psychosis
Interventions
pimavanserin tartrate (ACP-103)
Drug
Lead sponsor
ACADIA Pharmaceuticals Inc.
Industry
Eligibility
Not listed
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2013
U.S. locations
1
States / cities
Danbury, Connecticut