Trastuzumab costs between $23,000-37,000 a year, which needs to be determined in combination with the treatment plan and health insurance policy. Trastuzumab is an imported class of chemotherapy drugs, 2020 was included in the scope of medical insurance, the cost of a single drug between 1375 yuan -2100 yuan, need to be administered through intravenous channels for treatment, the first time the drug time for one year, according to the 21 days as a cycle of continuous use for 3 weeks, a year need to use about 17 drugs, that is, a year of the cost is in the 23,000-37,000 yuan. However, different patients’ medication time, dosage and local medical insurance reimbursement rate are different, so there will be a difference in the specific cost, there is no way to give a very accurate answer, it is recommended to listen to the doctor’s guidance, do not self-medication.