For adult men, the more common sexual dysfunction is mainly premature ejaculation and penile erectile dysfunction. The incidence of premature ejaculation is currently higher than that of erectile dysfunction. For patients with premature ejaculation, the main drug of choice in the clinic is dapoxetine hydrochloride, which has a clear effect on prolonging sexual life. Dapoxetine is taken one hour before the start of sexual intercourse and can prolong the duration of sexual intercourse within 24 hours. The current first-line treatment for penile erectile function, is a phosphodiesterase inhibitor of the sildenafil class. Sildenafil is also taken half an hour before the start of sexual intercourse, usually within 4 hours, to achieve effective relief of penile erectile dysfunction with an efficiency of more than 80%. Taking sildenafil will not cause abnormal penile erection, but will only induce penile erection under the condition of sexual stimulation.