必利勁为商品名，通用名称为盐酸达泊西汀片，因个体异大，并不存在盐酸达泊西汀片几天口服一次比较好，本品说明书推荐最大用药剂量的使用频率为24小时一次，但具体用药剂量及频率，需遵從醫生示。 Dapoxetine Hydrochloride Tablets is a kind of medication for the treatment of premature ejaculation in men aged 18 to 64 years, when men appear to be affected by premature ejaculation and have poor ejaculation control, they can take this product orally 1 to 3 hours before sexual intercourse according to the doctor’s advice. The maximum recommended dosage of this product is not more than once every 24 hours, due to individual differences, the specific dosage and frequency of medication, but also need to follow the doctor’s advice. When using the drug, some adverse reactions may occur, such as mild headache, nausea, etc., but because the side effects are transient and will disappear soon, there is no need to worry too much. People who are allergic to the ingredients contained in this product, patients with moderate to severe liver injury and other people should be prohibited from using this product. In addition, during the use of the drug, do not take with ketoconazole, telithromycin, atazanavir and other drugs, and avoid drinking alcohol to avoid adverse reactions. If there is a need for medication, it is recommended to go to the hospital in a timely manner and follow the doctor’s instructions to avoid blind use of medication.