B002 in Patients With HER2-positive Breast Cancer

Usage: intravenous infusion; B002, doses 2, 6, 12, 16, 20 mg / kg, intravenous drip. The infusion time was 120 ± 10 minutes for the first time; if the patient was tolerated, the follow-up time was adjusted to 60 ± 10 minutes. Pre-treatment was performed using phenergan (25 mg, intramuscular) within 30 minutes prior to each study drug infusion. The dosing cycle is administered once every 3 weeks for one cycle and can be administered continuously until the disease progresses or is intolerable.