Glenmark Pharma to Launch Generic Breast Cancer Injection in US Market
Glenmark Pharmaceuticals Inc., USA will introduce Eribulin Mesylate Injection in the United States market starting September 2025. The injection is bioequivalent to Eisai Inc.'s Halaven® Injection, a breast cancer treatment drug. Halaven® Injection had annual sales of approximately $66.30 million in the US for the 12-month period ending July 2025. This launch marks Glenmark's entry into complex generics in the US institutional segment, offering a potentially more affordable option for breast cancer patients.

*this image is generated using AI for illustrative purposes only.
Glenmark Pharmaceuticals Inc., USA, a subsidiary of Glenmark Pharmaceuticals Limited, is set to introduce Eribulin Mesylate Injection in the United States market, with distribution scheduled to begin in September 2025. This marks a significant milestone for the company as it enters the complex generics arena in the US institutional segment.
Bioequivalent to Halaven
The company's Eribulin Mesylate Injection, 1 mg/2 mL (0.5 mg/mL) Single-Dose Vials, is bioequivalent and therapeutically equivalent to Eisai Inc.'s Halaven® Injection, a widely prescribed oncology drug for breast cancer treatment.
Market Potential
According to IQVIA® sales data for the 12-month period ending July 2025, Halaven® Injection recorded annual sales of approximately $66.30 million in the United States.
Strategic Importance
Marc Kikuchi, President & Business Head, North America at Glenmark, commented on the launch: "As the first complex generic in our portfolio, this launch marks both our commitment to growing our product offerings within the institutional channel and reinforces our dedication to bringing quality and affordable alternatives to market for patients in need."
Regulatory Approval
It's important to note that Glenmark's Eribulin Mesylate Injection is approved only for the indications listed in Glenmark's approved label.
Conclusion
This launch represents a strategic move for Glenmark Pharmaceuticals as it expands its presence in the US generic oncology market, potentially offering a more affordable option for breast cancer patients while tapping into a significant revenue stream.
The company's ability to successfully develop and gain approval for this complex generic demonstrates its growing capabilities in the pharmaceutical sector, particularly in the challenging area of oncology treatments.