The generic name of 必利勁 is Dapoxetine Tablets. There are many differences between Tadalafil and Dapoxetine, such as different indications, different adverse reactions and different contraindications. 1. Different indications: Tadalafil is mainly applicable to erectile dysfunction; Dapoxetine is mainly used for the treatment of male premature ejaculation patients aged 18-64. 2. Adverse reactions are different: tadalafil adverse reactions are mainly headache, dyspepsia, a few patients will have dizziness, tachycardia, facial flushing, rash, hives, etc.; Dapoxetine tablets adverse reactions: headache, dizziness, nausea, diarrhea, insomnia, fatigue. 3. Contraindications are different: tadalafil contraindications: allergy to drug components are prohibited, the use of nitrate drugs is prohibited during the use of nitrate drugs, there is a potential cardiac risk, patients with heart disease should be careful to use. Contraindications for Dapoxetine tablets: allergy to the components of the drug and excipients, patients with heart failure, can not be used in conjunction with monoamine oxidase inhibitors, prohibited in patients with moderate and severe liver injury. The drug needs to be used under the guidance of a professional doctor to avoid abusing the drug yourself.