Table of Contents
- What is ACP-204?
- Medical Condition: Alzheimer’s Disease Psychosis
- How ACP-204 Works
- Clinical Trials
- Dosage and Administration
- Eligibility Criteria
- Potential Benefits
- Safety Considerations
What is ACP-204?
ACP-204 TARTRATE, also known simply as ACP-204, is a new medication being studied for the treatment of psychosis in adults with Alzheimer’s disease[1]. It is currently undergoing clinical trials to evaluate its safety and effectiveness. ACP-204 is a potent and selective antagonist/inverse agonist of a specific type of serotonin receptor in the brain[1]. This means it blocks or reverses the action of serotonin at certain sites in the brain, which may help reduce psychotic symptoms.
Medical Condition: Alzheimer’s Disease Psychosis
ACP-204 is being developed to treat Alzheimer’s Disease Psychosis (ADP)[1][2]. Alzheimer’s disease is a progressive brain disorder that affects memory, thinking skills, and the ability to carry out simple tasks. Some people with Alzheimer’s also experience psychosis, which can include hallucinations (seeing or hearing things that aren’t there) and delusions (false beliefs). These symptoms can be distressing for both patients and their caregivers.
How ACP-204 Works
ACP-204 targets a specific type of serotonin receptor in the brain called 5-hydroxytryptamine (serotonin) receptor subtype 2A[1]. By blocking or reversing the action of serotonin at these receptors, ACP-204 may help reduce psychotic symptoms in people with Alzheimer’s disease. This approach is different from current antipsychotic medications and may offer a new treatment option for patients.
Clinical Trials
ACP-204 is currently being studied in clinical trials to determine its safety and effectiveness. There are two main studies:
- A Phase 2/3 trial evaluating different doses of ACP-204 compared to placebo in adults with Alzheimer’s Disease Psychosis[1].
- A 52-week open-label extension study to evaluate the long-term safety and tolerability of ACP-204 in subjects with ADP[2].
These studies aim to determine if ACP-204 can effectively reduce psychotic symptoms and improve overall function in people with Alzheimer’s disease.
Dosage and Administration
In the clinical trials, ACP-204 is being tested at two different doses:
- 30 mg once daily
- 60 mg once daily
The medication is given as a capsule and can be taken with or without food[1]. It’s important to note that the optimal dose and administration schedule may change based on the results of these studies.
Eligibility Criteria
To participate in the ACP-204 clinical trials, patients must meet certain criteria. Some key eligibility factors include[1]:
- Age 55 to 85 years old
- Diagnosis of Alzheimer’s disease with psychotic symptoms
- Stable on current Alzheimer’s medications (if applicable)
- Have a designated caregiver or study partner
- Meet specific cognitive function criteria (measured by tests like the Mini-Mental State Examination or MMSE)
There are also several exclusion criteria, such as certain medical conditions or medications that might interfere with the study results or pose safety risks[1][2].
Potential Benefits
While the effectiveness of ACP-204 is still being studied, the hope is that it may provide several benefits for people with Alzheimer’s Disease Psychosis:
- Reduction in psychotic symptoms (hallucinations and delusions)
- Improved overall function and quality of life
- A potentially safer alternative to current antipsychotic medications
The clinical trials are measuring these outcomes using specific scales, such as the Scale for the Assessment of Positive Symptoms-Hallucinations and Delusions subscales (SAPS-H+D) and the Clinical Global Impression-Improvement in the ADP context (CGI-I-ADP)[1][2].
Safety Considerations
As with any new medication, safety is a primary concern in the ACP-204 clinical trials. The studies are closely monitoring for any side effects or adverse events. Some specific safety considerations include[1][2]:
- Monitoring for any changes in physical health, including lab tests
- Watching for any worsening of Alzheimer’s symptoms
- Checking for interactions with other medications
- Long-term safety evaluation in the 52-week extension study
It’s important to note that ACP-204 is still an investigational drug, and its full safety profile is not yet known. Patients and caregivers should discuss any concerns with their healthcare provider and study team.




