必利勁 is the trade name, generic name is dapoxetine hydrochloride tablets, is clinically used for the treatment of premature ejaculation of drugs, need to be taken before sex, usually on demand, up to once a day. The essence of premature ejaculation is that the ejaculatory center is too sensitive, and dapoxetine hydrochloride can inhibit the transmission of neurotransmitters in the ejaculatory center, reduce the sensitivity of the ejaculatory center of the cerebral cortex, and play a role in delaying time. Dapoxetine hydrochloride tablets are taken during sexual intercourse for adult male patients between the ages of 18 and 64, and need to be taken 1 to 3 hours before sexual intercourse. Before using the drug, it is also important to know that the drug is contraindicated in people with a known allergy to the product, is prohibited for use in patients with significant pathological conditions of the heart, and is prohibited for use 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. Adverse reactions such as dizziness, nausea, and headache may occur during the course of the medication. The drug should be applied under medical supervision.