Estrada 必利勁 and Etinjo are both trade names and their generic name is Dapoxetine Hydrochloride. The difference is the place of manufacture and price. 1. Place of production: the first two are imported drugs, the latter is a domestic drug. Different manufacturers lead to different trade names. It is mainly used for the treatment of male premature ejaculation patients aged 18 to 64. 2. Price: The price of the former two is higher than the latter. The price of one tablet of the imported drug is around sixty dollars, while the price of one tablet of the domestic one is around twenty dollars. In comparison, the price of the imported drug is higher. There is not much difference in the efficacy of these three drugs. Care should be taken when using them as they can cause adverse reactions such as headache, dizziness, nausea and diarrhea. The drug is contraindicated in people with a known allergy to the drug, in patients with a significant pathological condition of the heart, in patients with moderate and severe liver damage. The drug is also not to be used in conjunction with thioridazine, strong cytochrome P450 3A4 inhibitors, and monoamine oxidase inhibitors. The above mentioned drugs need to be used only under the evaluation of a specialized physician.