How long to take Perpercetrile Capsules is effective cannot be determined, it varies from person to person, and it usually takes more than 1 month to be effective. Pipecilli capsule is an anti-tumor drug, the recommended dose of 125mg, once a day can be used, 21 days of continuous medication, followed by 7 days of drug withdrawal, 28 days for a treatment cycle. During the period should adhere to the same time every day at the same time continuous medication. Treatment of hormone receptor positive, epidermal growth factor receptor 2 negative or advanced breast cancer. Pharmacokinetic studies of this product have shown that it peaks 6 to 12 hours after administration. Bioavailability is 46%, and steady state is reached with daily dosing for 8 days. The onset of action of the drug is related to the patient’s own condition, tolerance, etc. It is generally recommended that patients take two cycles of oral administration followed by a comprehensive review to evaluate the efficacy of the treatment. There have been no studies on the use in pregnant women and it is not recommended for use in lactating women. This product is contraindicated in persons who are allergic to this product and in persons taking products containing St. John’s wort. The use of this product should be under the supervision of a doctor experienced in the use of drugs, and timely feedback on the use of medication. Any discomfort during the period should be sought immediately.