ObjectiveTo explore the role of clinical pharmacists in caring for one patient with breast cancer complicated with multiple metastases. MethodsClinical pharmacists monitored the entire treatment process of a patient with breast cancer complicated with multiple metastases. Blood glucose level was recorded, and the pharmacists evaluated the patient's pain, gave appropriate doses of cancer pain drugs, and responded positively to the hand-foot syndrome (HFS) induced by chemotherapeutic drugs. ResultsWith the participation of the pharmacists, clinicians adjusted the medication. Ideal control of cancer pain and blood glucose was achieved with successful chemotherapy, and HFS fully recovered. ConclusionPharmaceutical care by clinical pharmacists can assist clinicians to ensure the safety and effectiveness of drug use.