必利勁 is the trade name and generic name for Dapoxetine Hydrochloride, a medication used to treat premature ejaculation. It should be taken 1~3 hours before sexual intercourse, 30~60mg each time, once every 24 hours. Due to individual differences, it is recommended to take it under the guidance of a doctor. The recommended first dose for all patients is 30 mg, which needs to be taken about 1 to 3 hours before sexual intercourse. If the effects of 30 mg are not satisfactory and side effects are within acceptable limits, the dose may be increased to the maximum recommended dose of 60 mg. The recommended maximum dose is every 24 hours. This product can be taken before or after a meal. If a physician chooses to use this product for the treatment of premature ejaculation, he or she should evaluate the risks and patient-reported benefits during the first 4 weeks of treatment with this medication or assess the patient’s risk-benefit balance after 6 therapeutic doses and decide whether to continue treatment with this product. The use of dapoxetine hydrochloride can cause adverse reactions such as headache, dizziness, nausea, and diarrhea. The drug is contraindicated in persons with known hypersensitivity to the product, in patients with significant pathological conditions of the heart, and in patients with moderate and severe hepatic impairment. The drug should also not be used in conjunction with thioridazine, strong cytochrome P450 3A4 inhibitors, and monoamine oxidase inhibitors. The drug is a prescription medication and should be used under the supervision of a physician.