Viagra generally refers to sildenafil, if simple impotence or simple premature ejaculation, delay spray and sildenafil is generally not recommended a piece of use, if there is impotence and premature ejaculation at the same time patients, can be used together. The main component of the delay spray is some surface anesthetics, through the surface anesthetics sprayed on the glans, can paralyze the glans part of the nerves, effectively reduce the glans sensitivity, so as to prolong the sex life time, if it is simple premature ejaculation using the delay spray can be. Sildenafil is a relatively common treatment of erectile dysfunction drugs, mainly in the role of sexual stimulation, can stimulate penile erection, for premature ejaculation role is not strong, mainly for impotence. However, some patients with impotence and premature ejaculation conditions co-exist, in order to improve the condition to promote sexual life, the two drugs can be used at the same time. Delay spray and sildenafil must be directed by a doctor to use the drug, the patient can not self-medication, allergic to the drug ingredients are prohibited.