For the treatment of impotence, pde5 inhibitors, that is, phosphodiesterase inhibitors, are mainly taken orally. The patient can choose the imported drug Viagra, and take one tablet orally one hour before sex. No drug is needed if they do not have sex. The domestic drug is called Ginger, which is also taken orally one tablet an hour before sex. If you don't have sex, you don't need to take medicine. If an elderly male has lower urinary tract symptoms, such as frequent urination, urgency of urination, waiting for urination, and poor urination, the first choice is Xieli, that is, tadalafil, which can be taken orally every day. One 5mg tablet can be taken to treat the lower urinary tract symptoms of elderly men at the same time. Premature ejaculation patients can choose Bi Li Jin symptomatic treatment, that is, dapoxetine hydrochloride, This is the only drug approved by the fda to treat premature ejaculation. Take one tablet orally two hours before sex, and do not take medicine if you do not have sex. The above scheme is only for reference. Please use the drug according to the drug description or the doctor's advice in a regular hospital.