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NCT Number: NCT07029581

Phase 2, Efficacy and Safety Study of ACP-204 in Lewy Body Dementia Psychosis

Multicenter, randomized, 6-week, double-blind, placebo-controlled, parallel-group, Phase 2 study in subjects with LBDP.

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Key information

Age range

55 year–84 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

Primary location

Ambulatory for Individual Practice for Specialized Medical Care in Psychiatry - Dr Ivo Natsov, Cherven Bryag, Bulgaria

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About this study

Study Website: https://illumerastudy.com/

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Male or female ≥55 years to <85 years of age at the Screening visit living in the community or, if permitted by local regulations, in an institutionalized setting
  • Can provide written informed consent. If the subject is deemed not competent to provide informed consent, the following requirements for consent must be met:
  • The subject's LAR must provide written informed consent.
  • The subject must provide written (if capable) informed assent per local regulations.
  • Meets either the clinical criteria for Parkinson's disease with dementia as defined by the Movement Disorder Society's Task Force or the revised clinical criteria for probable dementia with Lewy bodies (DLB) by consensus criteria (Fourth consensus report of the DLB Consortium).
  • Meets the revised criteria for psychosis in major or mild neurocognitive disorder established by the International Psychogeriatrics Association

Exclusion criteria

  • Is in hospice, is receiving end-of-life palliative care, or is bedridden
  • Has psychotic symptoms that are primarily attributable to delirium, substance abuse, or a medical or psychiatric condition (e.g. schizophrenia, bipolar disorder, delusional disorder) other than dementia
  • Is actively suicidal at Visit 1 (Screening) or Visit 2 (Baseline)
  • Has a history or current evidence of a serious and/or significant unstable cardiovascular, respiratory, endocrine, gastrointestinal, renal, hepatic, hematologic, immunologic, genitourinary, psychiatric or neurologic (including stroke, chronic seizures, or clinically significant head injury) abnormality or disease or other medical disorder, including cancer or malignancies that could interfere with subject's ability to complete the study or comply with study procedures
  • Has other clinically significant CNS abnormalities that are most likely contributing to the dementia or findings on MRI or CT

Treatment and study plan

ACP-204

Drug

Provided as 1 capsule, to be taken orally once daily

Placebo

Drug

Provided as 1 capsule, to be taken orally once daily

Primary outcomes

  1. Change from Baseline in SAPS-LBDP total score at Week 6

    Time frame: 6 weeks

    Change from Baseline in Scale for the Assessment of Positive Symptoms- Lewy Body Dementia Psychosis (SAPS-LBDP) total score at Week 6

Study contacts

Contact information is provided by the study sponsor or research team.

Becky Howell

CONTACT

[email protected]

848-702-1886

Kristin Kidd

CONTACT

[email protected]

434-841-3162

Sponsors and collaborators

Lead sponsor

ACADIA Pharmaceuticals Inc.

Industry

Registry information

Official study title

A Double-Blind, Placebo-Controlled, Phase 2, Efficacy and Safety Study of ACP-204 in Adults With Lewy Body Dementia Psychosis (LBDP)

Important dates

Study start
2025
Primary completion
2028
Study completion
2028
First posted
Jun 19, 2025
Registry last updated
Jul 24, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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