ACADIA Pharmaceuticals Announces Positive Top-Line Results From Phase II Study of Pimavanserin for Alzheimer’s Disease Psychosis
Data Support Moving Forward With
Conference Call and Webcast to Be Held Today,
In this Phase II exploratory study, pimavanserin met the primary
endpoint showing a statistically significant reduction in psychosis
versus placebo as measured by the
“Alzheimer’s disease patients suffer from a number of debilitating
symptoms, of which psychosis carries a poor prognosis and is associated
with earlier placement into nursing homes,” said
About the Phase II -019 Study
The Phase II -019 Study was a double-blind, placebo-controlled exploratory trial designed to evaluate the efficacy and safety of pimavanserin as a treatment for patients with AD Psychosis. A total of 181 patients were enrolled in the study in the
Pimavanserin demonstrated efficacy on the primary endpoint of the -019 Study with a 3.76 point improvement in psychosis at week 6 compared to a 1.93 point improvement for placebo, representing a statistically significant treatment improvement in the NPI-NH Psychosis score (p=0.0451). Baseline mean scores for the pimavanserin and placebo treated groups were 9.52 and 10.00, respectively.
Atypical antipsychotics have been associated with a statistically significant worsening of cognitive function in patients with Alzheimer’s disease. In the -019 Study, over the course of 12 weeks of treatment, pimavanserin did not impair cognition as measured by the Mini-Mental State Examination (MMSE) score and was similar to placebo. On the secondary endpoint of mean change in NPI-NH Psychosis score at week 12, pimavanserin maintained the improvement on psychosis observed at the week 6 primary endpoint, but did not statistically separate from placebo.
In the -019 Study, pimavanserin was generally well tolerated and the safety profile was consistent with what has been observed in previous studies. Based on a preliminary analysis of safety data, the most common adverse events reported were falls, urinary tract infection and agitation. The mortality rate was the same in the pimavanserin and placebo treatment groups. The mean age of patients in the study was 86 years.
The data analysis of the Phase II -019 Study is ongoing and ACADIA plans to present data from this study at a future medical conference.
Conference Call and Webcast Information
ACADIA will host a conference call and webcast today,
About Alzheimer’s Disease Psychosis (AD Psychosis)
According to the Alzheimer’s Association, around 5.4 million people in
Pimavanserin is a selective serotonin inverse agonist (SSIA) preferentially targeting 5-HT2A receptors. These receptors are thought to play an important role in AD Psychosis. Pimavanserin is being evaluated in an extensive clinical development program by ACADIA across multiple other indications including Alzheimer’s disease agitation, schizophrenia – inadequate response, schizophrenia – negative symptoms, and major depressive disorder. Pimavanserin (34 mg) was approved for the treatment of hallucinations and delusions associated with Parkinson’s disease psychosis by the
ACADIA is a biopharmaceutical company focused on the development and commercialization of innovative medicines to address unmet medical needs in central nervous system disorders. ACADIA maintains a website at www.acadia-pharm.com to which we regularly post copies of our press releases as well as additional information and through which interested parties can subscribe to receive e-mail alerts.
Statements in this press release that are not strictly historical in nature are forward-looking statements. These statements include but are not limited to statements related to the progress and timing of ACADIA’s drug discovery and development programs; the benefits to be derived from NUPLAZID (pimavanserin) and ACADIA’s product candidates, including whether pimavanserin can improve psychosis in another major neurological disorder or be used to treat AD Psychosis; whether the data from the -019 Study support moving forward with further development in AD Psychosis or provide strategic momentum for the further development of pimavanserin to address the needs of AD Psychosis patients; and ACADIA’s plans to present data from the -019 Study. These statements are only predictions based on current information and expectations and involve a number of risks and uncertainties. Actual events or results may differ materially from those projected in any of such statements due to various factors, including the risks and uncertainties inherent in drug discovery, development, approval and commercialization, and in collaborations with others, and the fact that past results of clinical trials may not be indicative of future trial results. For a discussion of these and other factors, please refer to ACADIA’s annual report on Form 10-K for the year ended
Important Safety Information and Indication for NUPLAZID (pimavanserin) tablets
WARNING: INCREASED MORTALITY IN ELDERLY PATIENTS WITH
Elderly patients with dementia-related psychosis treated with antipsychotic drugs are at an increased risk of death. NUPLAZID is not approved for the treatment of patients with dementia-related psychosis unrelated to the hallucinations and delusions associated with Parkinson’s disease psychosis.
NUPLAZID is an atypical antipsychotic indicated for the treatment of hallucinations and delusions associated with Parkinson’s disease psychosis.
QT Interval Prolongation: NUPLAZID prolongs the QT interval. The use of NUPLAZID should be avoided in patients with known QT prolongation or in combination with other drugs known to prolong QT interval including Class 1A antiarrhythmics or Class 3 antiarrhythmics, certain antipsychotic medications, and certain antibiotics. NUPLAZID should also be avoided in patients with a history of cardiac arrhythmias, as well as other circumstances that may increase the risk of the occurrence of torsade de pointes and/or sudden death, including symptomatic bradycardia, hypokalemia or hypomagnesemia, and presence of congenital prolongation of the QT interval.
Adverse Reactions: The most common adverse reactions (≥2% for NUPLAZID and greater than placebo) were peripheral edema (7% vs 2%), nausea (7% vs 4%), confusional state (6% vs 3%), hallucination (5% vs 3%), constipation (4% vs 3%), and gait disturbance (2% vs <1%).
Drug Interactions: Strong CYP3A4 inhibitors (eg, ketoconazole) increase NUPLAZID concentrations. Reduce the NUPLAZID dose by one-half. Strong CYP3A4 inducers may reduce NUPLAZID exposure, monitor for reduced efficacy. Increase in NUPLAZID dosage may be needed.
Renal Impairment: No dosage adjustment for NUPLAZID is needed in patients with mild to moderate renal impairment. Use of NUPLAZID is not recommended in patients with severe renal impairment.
Hepatic Impairment: Use of NUPLAZID is not recommended in patients with hepatic impairment. NUPLAZID has not been evaluated in this patient population.
Pregnancy: Use of NUPLAZID in pregnant women has not been evaluated and should therefore be used in pregnancy only if the potential benefit justifies the potential risk to the mother and fetus.
Pediatric Use: Safety and efficacy have not been established in pediatric patients.
Dosage and Administration: Recommended dose: 34 mg per day, taken orally as two 17-mg tablets once daily, without titration.
For additional Important Safety Information, including boxed warning, please see the full Prescribing Information for NUPLAZID at https://www.nuplazid.com/pdf/NUPLAZID_Prescribing_Information.pdf.