Karuna Therapeutics Announces U.S. Food and Drug Administration Accepts New Drug Application for KarXT for the Treatment of Schizophrenia

Karuna Therapeutics, Inc. (NASDAQ: KRTX), a biopharmaceutical company driven to discover, develop, and deliver transformative medicines for people living with psychiatric and neurological conditions, today announced the U.S. Food and Drug Administration (FDA) has accepted its New Drug Application (NDA) for KarXT (xanomeline-trospium) for the treatment of schizophrenia in adults. The application has been granted a Prescription Drug User Fee Act (PDUFA) date of September 26, 2024.

“We are pleased the NDA for KarXT has been accepted, and we look forward to working with the FDA during the review process,” said Bill Meury, president and chief executive officer of Karuna Therapeutics. “There is a significant need for new treatment options for serious mental illness. If approved, KarXT could be one of the more important new product introductions in neuropsychiatry by providing a novel pharmacological approach for the treatment of schizophrenia.”

“Schizophrenia’s disabling symptoms pose significant challenges to navigating crucial aspects of life, including developing relationships, maintaining employment, and securing safe housing,” said Gordon Lavigne, M.Ed., chief executive officer, Schizophrenia & Psychosis Action Alliance. “Diagnosis marks the beginning of an often long and tiresome search for effective and tolerable treatment options. The nature and magnitude of side effects often play a pivotal role in whether someone continues treatment, which is often crucial to minimize the risk of relapse and realize the life-altering benefits of long-term treatment. Potential approval of a pharmacologically distinct treatment option would be a welcome innovation for people living with schizophrenia.”

The NDA submission is supported by efficacy and long-term safety data from the EMERGENT program, the clinical program evaluating KarXT as a treatment for schizophrenia. The EMERGENT program includes the three completed positive EMERGENT-1, EMERGENT-2, and EMERGENT-3 trials evaluating the efficacy and safety of KarXT compared to placebo, and the EMERGENT-4 and EMERGENT-5 trials evaluating the long-term safety of KarXT.

In all three placebo-controlled trials, KarXT met its primary endpoint, demonstrating statistically significant and clinically meaningful improvements in symptoms of schizophrenia compared to placebo as measured by Positive and Negative Syndrome Scale (PANSS) total score. KarXT was found to be generally well tolerated, with the most common adverse events being cholinergic in nature and mild to moderate in severity. Notably, KarXT was not associated with common side effects of currently available antipsychotics, including weight gain, somnolence, and movement disorders.