Docetaxel belongs to the paclitaxel class of antitumor drugs and is mainly used for the treatment of locally advanced or metastatic breast cancer. The retention accomplished by using docetaxel, which means that the drug stays motionless, the treatment for retention mainly includes pre-dose treatment and post-dose treatment, as follows. 1. Pre-dose: Oral glucocorticoid drugs, such as dexamethasone and betamethasone, can be taken before the drug is administered to prevent allergic reactions and fluid retention. 2. After using the drug: If the drug retention occurs after using the drug, you need to regularly observe the patient’s weight changes, and then observe the amount of urine, as well as the color and nature of the urine, record the amount of urine discharged by the patient every 24 hours, and find that there is a small amount of urine, urine yellow and other symptoms, you need to advise the patient to drink more water, and to take a low-salt diet. Allergic to the drug ingredients, as well as pregnancy, impaired liver function is prohibited, in lactation with caution. After the use of the drug, some patients may experience myelosuppression, peripheral neuropathy, mucositis, etc., and need to stop the drug in time. After the use of docetaxel to complete the lag should be regularly observed, once any discomfort occurs, it is necessary to consult a doctor in time, do not take the initiative to deal with it.