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 3000. Commonly used chemotherapy drugs include fluorouracil, methotrexate, cyclophosphamide, and epirubicin. For triple negative breast cancer, docetaxel, paclitaxel or combined with lopressor is also required. Drugs to protect liver function should be applied during intravenous chemotherapy, as well as drugs to protect the kidneys, because chemotherapy drugs tend to induce liver and kidney damage, and common gastrointestinal reactions can occur. Therefore, proton pump inhibitors as well as 5-hydroxytryptamine receptor antagonists should also be given. The cost of one cycle of intravenous chemotherapy is around 3000, while patients with breast cancer need 6-8 cycles of intravenous chemotherapy after surgery and also regular review.