Generic name of Viagra drug is Sildenafil Citrate, which is mainly used for the treatment of erectile dysfunction and has no significant effect on penile sensitivity and premature ejaculation. Sildenafil citrate increases blood flow to the corpus cavernosum and improves its erectile ability, while it has no effect on premature ejaculation. The common side effects of this product are dizziness, headache, flushing, indigestion, nausea, rash, myalgia, etc. It is prohibited for patients who are allergic to this drug, and it cannot be combined with nitrate drugs. Currently used in clinical treatment of premature ejaculation drugs are mainly dapoxetine hydrochloride, which can inhibit the ejaculatory center, effectively improve the symptoms of premature ejaculation. It is recommended to take medication under the guidance of a doctor, not indiscriminate use of drugs, so as not to affect the therapeutic effect.