Amphastar Pharmaceuticals Inc. has announced a significant expansion of its U.S. manufacturing operations at its Rancho Cucamonga headquarters. The bio-pharmaceutical company, known for its complex generic and proprietary injectable, inhalation, and intranasal products, plans to quadruple its production capacity over the next three to five years. This strategic initiative marks the largest investment in domestic infrastructure in Amphastar's history and aims to enhance supply chain resilience. The expansion will include a state-of-the-art production plant and advanced technologies, creating new jobs in research and development, engineering, manufacturing, and quality operations. Amphastar's commitment to domestic manufacturing is underscored by its focus on producing essential medicines in the United States.