Tablets can drink some tea after taking Letrozole tablets, but it is usually not recommended to drink, so as not to adversely affect the action of the drug, tea contains a variety of amino acids, vitamins, inorganic salts, tannins, volatile oils, caffeine, theophylline and so on can interact with some drugs, will affect the efficacy of the drug. Letrozole tablets are antitumor drugs. It is used for the treatment of postmenopausal, estrogen receptor-positive, progesterone receptor-positive or receptor status unknown advanced breast cancer patients, can also be used for postmenopausal patients with early breast cancer, postmenopausal patients with early breast cancer who have been receiving tamoxifen adjuvant therapy for 5 years. It is contraindicated in patients with hypersensitivity to the active drug and any of the excipients, premenopausal, pregnant, and lactating women. Adverse reactions such as nausea, vomiting, dyspepsia, constipation, diarrhea, and abdominal pain may occur in some patients after use. The use of medication must be carried out in accordance with the doctor’s instructions and carefully read the instructions.