Tamoxifen tablets are prescription drugs mainly used for the treatment of breast cancer and adjuvant therapy after breast cancer surgery to avoid recurrence. It is taken with warm boiled water. During the medication, pay attention to checking the blood calcium and liver function, and stop the medication in time if there is any abnormality. The common adverse reactions of tamoxifen tablets are: transient bone pain; gastrointestinal reactions: anorexia, nausea, vomiting, etc.; there are also menstrual disorders, amenorrhea, endometrial hyperplasia and other abnormal reactions. If the above adverse reactions occur, you need to stop the drug in time, and go to the hospital, under the guidance of the doctor to replace other drugs for treatment.