Neurocrine Presents Head-to-Head Data for Ingrezza vs Austedo XR
Neurocrine announced the presentation of the first head-to-head data comparing vesicular monoamine transporter 2, or VMAT2, target occupancy between Ingrezza - valbenazine - capsules and Austedo XR - deutetrabenazine - at therapeutic doses. Results from the study confirmed that both compounds engage VMAT2; however, Ingrezza demonstrated significantly higher VMAT2 target occupancy and greater potency. VMAT2 inhibition is an established target for treatment of hyperkinetic movement disorders, such as tardive dyskinesia and Huntington's disease chorea. VMAT2 target occupancy is a key measurement thought to be associated with the level of drug response in these conditions. Higher VMAT2 occupancy indicates greater engagement of the target, and inhibition of VMAT2 lowers excessive dopamine transmission associated with involuntary movements. The primary TO analysis demonstrated a least squares mean VMAT2 occupancy of approximately 76.5% for Ingrezza compared with approximately 38.3% for Austedo XR at therapeutic doses. All doses of Ingrezza and Austedo XR were generally well tolerated and consistent with the known safety profile of each compound.
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Neurocrine Initiates Phase 2 Study for NBI-1065890 in Tardive Dyskinesia
- Clinical Trial Launch: Neurocrine Biosciences has announced the initiation of its Phase 2 clinical study for NBI-1065890, aiming to enroll approximately 100 adults with tardive dyskinesia to assess the drug's efficacy, safety, and tolerability, marking a strategic advancement in VMAT2 biology.
- Drug Characteristics: NBI-1065890 is a next-generation selective VMAT2 inhibitor with distinct physical and chemical properties that may provide treatment options for a broader range of tardive dyskinesia patients, reflecting the company's deep expertise and innovative capabilities in neuroscience.
- Efficacy Assessment Metrics: The primary efficacy endpoint of the study is the change from baseline in the AIMS score at Week 8, aiming to scientifically validate the clinical application potential of NBI-1065890, thereby delivering lasting positive impacts for patients.
- Market Outlook: Tardive dyskinesia affects at least 800,000 adults in the U.S., and the successful development of NBI-1065890 will further solidify Neurocrine's leadership position in the treatment of neuropsychiatric disorders, providing strong support for the company's future growth.

Neurocrine Initiates Phase 2 Study for NBI-1065890 in Tardive Dyskinesia
- Clinical Trial Launch: Neurocrine Biosciences has announced the initiation of its Phase 2 clinical study for NBI-1065890, planning to enroll approximately 100 adults with tardive dyskinesia to assess the drug's efficacy, safety, and tolerability.
- Drug Characteristics: NBI-1065890 is a selective VMAT2 inhibitor with distinct physical and chemical properties, potentially offering treatment options for a broader range of tardive dyskinesia patients, reflecting nearly 20 years of expertise in VMAT2 inhibition.
- Efficacy Assessment Metrics: The primary efficacy endpoint of the study is the change from baseline in the AIMS score at Week 8, aiming to scientifically validate the clinical value of the drug and enhance its market potential.
- Strategic Importance: Advancing this clinical trial is a key component of Neurocrine's strategy to define the future of VMAT2 biology and deliver lasting therapeutic impacts for patients, further solidifying its leadership position in the neuroscience field.









