Capecitabine can be taken orally on the day of chemotherapy. Capecitabine is an oral chemotherapy drug that is now widely used for various types of tumors. It is mainly used in adjuvant chemotherapy for colon cancer, rectal cancer, breast cancer and so on. It has the efficacy of killing cancer cells, improving tumor control rate, prolonging patients’ progression-free survival time and overall survival time. It can be applied synchronously with chemotherapeutic drugs, which can improve the sensitivity of the patient’s organism to chemotherapeutic drugs. Patients taking capecitabine may experience adverse reactions such as anorexia, diarrhea, nausea, vomiting, headache, insomnia, and so on; they also tend to develop obstructive syndromes such as numbness, dullness of sensation, absence of pain, or pain sensation. It is contraindicated for people with a history of allergies, pregnant women, and those who have serious side effects to the drug. Capecitabine dosage should be used under the supervision of a medical professional.