ACADIA Pharmaceuticals Initiates Phase III Trial of Pimavanserin for Adjunctive Treatment in Patients with Schizophrenia
“About 30 percent of patients with schizophrenia do not achieve an
adequate response to a single antipsychotic medication, and as a result
more than one in four schizophrenia patients are treated with two or
more antipsychotics,” said
ENHANCE-1 is a Phase III, six-week, randomized, double-blind, placebo-controlled, multi-center, outpatient study designed to examine the efficacy and safety of adjunctive use of pimavanserin in patients with schizophrenia who have not achieved an adequate response to their current antipsychotic treatment. Approximately 380 patients will be randomized to receive pimavanserin, or placebo, orally, once daily, in addition to their ongoing antipsychotic in a flexible dosing regimen. The starting daily dose of 20 mg of pimavanserin at baseline may be adjusted to 34 mg or 10 mg during the first three weeks of treatment. The primary endpoint of the study is the change from baseline to week six on the Positive and Negative Syndrome Scale (PANSS) total score. Following participation in ENHANCE-1, patients will be eligible to enroll in a 52-week open-label extension study.
According to the
According to the
Pimavanserin is a selective serotonin inverse agonist (SSIA)
preferentially targeting 5-HT2A receptors. These receptors
are thought to play an important role in schizophrenia. Pimavanserin is
being evaluated in an extensive clinical development program by ACADIA
across multiple indications. 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 expected design and scope
of ACADIA’s clinical trials, and the benefits to be derived from
NUPLAZID (pimavanserin) and ACADIA’s product candidates, including
whether pimavanserin could provide an important new option for
adjunctive treatment of schizophrenia or improve clinical outcomes by
augmenting the efficacy of currently used antipsychotics and/or
lessening the undesirable side effects associated with polypharmacy.
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 DEMENTIA-RELATED PSYCHOSIS
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.