In many places, people call Viagra, which is mainly used to improve the quality of sexual life. Many men will take it when they need it, but we should pay attention to taking it in advance, for example, one and a half hours in advance, so that it will have the desired effect. For some people with male dysfunction, the effect of using Viagra is good, which can obviously improve the quality of sexual life and initially consolidate the feelings between husband and wife. However, when we use it, Well, what my friends have described above is the function and efficacy of Viagra. I believe everyone understands it. Then, if our male friends need it in their daily lives, they can go to a hospital doctor to buy it, or go to a pharmacy to buy it with a prescription. We must pay attention to the dosage and usage, so as not to cause corresponding damage to our bodies.