The Food and Drug Administration has approved trastuzumab-dkst (Ogivri) as a biosimilar to trastuzumab (Herceptin) for the treatment of patients with HER2+ breast or metastatic gastric or gastroesophageal junction adenocarcinoma.
This is the first biosimilar approved in the United States for the treatment of breast cancer or gastric cancer and the second biosimilar approved for the treatment of cancer, the FDA said in a statement.
The approval of trastuzumab-dkst is based on structural and functional characterization, animal study data, human pharmacokinetic and pharmacodynamic data, clinical immunogenicity data, and other clinical safety and effectiveness data.
Common expected side effects of trastuzumab-dkst for the treatment of HER2+ breast cancer include headache, diarrhea, nausea, chills, fever, infection, congestive heart failure, insomnia, cough, and rash. Common expected side effects for the treatment of HER2+ metastatic gastric cancer include neutropenia, diarrhea, fatigue, anemia, stomatitis, weight loss, upper respiratory tract infections, fever, thrombocytopenia, mucosal inflammation, nasopharyngitis, and dysgeusia.
The biosimilar label contains a Boxed Warning – as trastuzumab does – about increased risks of cardiomyopathy, infusion reactions, pulmonary toxicity, and fetal toxicity.
The FDA’s Oncologic Drugs Advisory Committee voted unanimously in July to recommend approval of the biosimilar, made by Mylan and Biocon.