Dapoxetine hydrochloride tablets are not Viagra, which refers to sildenafil, a drug for treating erectile dysfunction in men, while dapoxetine hydrochloride tablets belong to the class of psychotropic drugs that can be used to treat premature ejaculation. Dapoxetine hydrochloride tablets for premature ejaculation is usually taken one hour before sex, after taking can reduce the sensitivity of the glans and the cerebral cortex, so as to delay the time of sex, such drugs have certain side effects, such as dizziness, headache, diarrhea, etc., and secondly, for the minors and pregnant women are prohibited to use. Sildenafil can improve erectile hardness and erection time, thus improving the quality of sexual life, it is worth noting that some patients may experience dizziness, flushing, blurred vision, etc., and sildenafil can not be co-taken with any form of nitrate drugs, or life-threatening situations may occur. There is no relationship between the two, it is worth noting that both drugs belong to the category of prescription drugs, must be prescribed by a doctor to buy and take, do not blindly buy and use, so as not to cause irreversible harm to the body.