Sildenafil tablets, whose full name is Sildenafil Citrate Tablets, can last for 1-2 hours after taking them for an erection. This drug, when ingested, dilates the capillaries of the body, thereby increasing the blood flow to the penis for a short period of time, thus improving erectile dysfunction in men. It must stimulate the penis after ingestion in order to achieve the purpose of making it erect, and can make men last for 1-2 hours during sexual intercourse. However, because individual physique is different, so the specific time varies from person to person. Patients should not have high expectations and psychological fallout, which may lead to obvious psychological erectile dysfunction. Patients are advised to use the medication under the guidance of a doctor and not to use this medication for a long time to prevent dependent medication. In addition, patients can improve male sexual function by means of behavioral training under the guidance of a doctor.