Alvotech and Dr. Reddy’s Announce FDA Acceptance of Biologic License Application for AVT03, a Proposed Biosimilar to Prolia® and Xgeva®

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HYDERABAD, India & REYKJAVIK, Iceland, March 18, 2025--(BUSINESS WIRE)--Dr. Reddy’s Laboratories Ltd. (BSE: 500124, NSE: DRREDDY, NYSE: RDY, NSEIFSC: DRREDDY; along with its subsidiaries together referred to as "Dr. Reddy’s") and Alvotech (NASDAQ: ALVO), a global biotech company specializing in the development and manufacture of biosimilar medicines for patients worldwide, today announced that the U.S. Food and Drug Administration (FDA) has accepted a 351(k) Biologic License Application (BLA) submission for AVT03, developed by Alvotech, a proposed biosimilar of Prolia® (denosumab) and Xgeva® (denosumab).

"The FDA's filing acceptance of Dr. Reddy's proposed denosumab biosimilar marks an important milestone in bringing this biosimilar medication to more patients throughout the U.S.," said Milan Kalawadia, Chief Executive Officer, Dr. Reddy’s North America.

"This milestone marks an important step in our mission to improve patient lives by expanding access to affordable and quality biologic medicines. We look forward to being able to serve the large population of patients requiring treatment for osteoporosis and other diseases of the bone," said Joseph McClellan, Chief Scientific Officer for Alvotech.

Prolia® is a prescription biologic medicine used to treat osteoporosis in women after menopause who are at high risk for bone fracture or cannot use another osteoporosis medicine or other osteoporosis medicines did not work well [1]. Xgeva® is a prescription biologic medicine used to prevent fracture, spinal cord compression, or the need for radiation or surgery to bone in patients with multiple myeloma and in patients with bone metastases from solid tumors [2].

In May 2024, Dr. Reddy’s and Alvotech entered into a License and Supply Agreement for AVT03. Under the agreement, Alvotech is responsible for the development and manufacturing of AVT03, while Dr. Reddy’s is responsible for registration and commercialization in applicable markets, including the U.S. After approval by the FDA, AVT03 is expected to be supplied in a single-dose prefilled syringe containing 60 mg in a 1 mL solution, as well as a 120 mg/1.7 mL (70 mg/mL) solution in a single-dose vial.

About AVT03

AVT03 is a human monoclonal antibody and biosimilar candidate to Prolia® and Xgeva®, which are both denosumab but in different presentations. Prolia® is indicated for the treatment of osteoporosis in postmenopausal women and for bone loss in adult men and women at increased risk of fracture [1]. Xgeva® is indicated for prevention of skeletal-related events such as pathological fractures in adults with advanced malignancies involving bone [2]. AVT03 is an investigational product and has not received regulatory approval in any country. Biosimilarity has not been established by regulatory authorities and is not claimed.