Catalyst Pharmaceuticals, Inc. announced the U.S. commercial launch of AGAMREE® (vamorolone) oral suspension 40 mg/mL for the treatment of Duchenne Muscular Dystrophy ("DMD") in patients aged two years and older. Following the U.S. Food and Drug Administration ("FDA") approval on October 26, 2023, AGAMREE is now available by prescription and dispensed throughout the United States through a specialty pharmacy network. Catalyst Pathways® Patient Assistance Program for AGAMREE® is a comprehensive patient support program that includes a dedicated, personalized support team that assists families throughout the AGAMREE treatment journey for eligible patients.

Duchenne Muscular Dystrophy, DMD, the most common form of muscular dystrophy, is a rare and life-threatening neuromuscular disorder characterized by progressive muscle dysfunction, ultimately leading to loss of ambulation, respiratory failure, and fatality. Current standard treatment for DMD involves corticosteroids, which often come with significant side effects. It is estimated that between 11,000 and 13,000 patients in the U.S. are affected by DMD, with approximately 70% of patients currently receiving a corticosteroid treatment.

Steroids are expected to remain the backbone of therapy for DMD patients and dosed concomitantly with other therapies. The FDA's approval of AGAMREE® was based on the data from the pivotal Phase 2b VISION-DMD study as supplemented with safety information collected from three open-label studies, including extension studies. In these trials, AGAMREE was administered at doses ranging from 2 to 6 mg/kg/day, extending for up to 48 months.

Compared with current standard-of-care corticosteroids, this novel corticosteroid treatment exhibited comparable efficacy, with data suggesting a reduction in adverse events, notably related to bone health, growth trajectory, and improved behavior.