Patients with breast cancer require routine intravenous chemotherapy after surgery, and the choice of specific chemotherapy regimen is related to the pathological type and biological behavior of the tumor. The cost of a commonly used cycle of intravenous chemotherapy should be around 3,000. Commonly used chemotherapy drugs, include fluorouracil, methotrexate, cyclophosphamide, and epirubicin. For triple-negative breast cancer, docetaxel, paclitaxel, or combined with lopressor are also applied. Drugs to protect liver function, as well as renal drugs, should be applied during intravenous chemotherapy, as chemotherapeutic drugs tend to induce hepatic and renal damage, and common gastrointestinal reactions can occur. So proton pump inhibitors as well as 5-hydroxytryptamine receptor antagonists should also be given. The cost of one cycle of intravenous chemotherapy is around 3,000, and patients with breast cancer need 6-8 cycles of intravenous chemotherapy after surgery, as well as regular follow-ups.