Is Trastuzumab an imported drug?

The original drug Trastuzumab (Trastuzumab) is an imported drug, and domestic drugs are also sold in China. The ingredients of the two drugs are basically the same. Trastuzumab is a monoclonal antibody used to treat breast cancer and gastric cancer. It is sold under brands such as Herceptin. It is specially used for HER2 receptor-positive cancers. It can be used alone or together with other chemotherapy drugs. Trastuzumab is administered by slow intravenous injection and subcutaneous injection. Common side effects include fever, infection, cough, headache, insomnia and rash, and other serious side effects include heart failure, allergic reactions and lung disease. Trastuzumab works by binding to the HER2 receptor and slowing cell replication.