How long does Viagra work?

Viagra's action time is generally about 4-6 hours, but the specific time of its action varies from person to person. In patients with erectile dysfunction, Viagra is a very commonly used drug. It is generally recommended to start oral administration half an hour to an hour before the same day. It is necessary to pay attention to not eating some greasy food before taking the drug. Drink as little as possible, because greasy food and drinking will affect the absorption of Viagra and affect the effect. In addition, after taking Viagra, there must be enough sexual stimulation and the heart must relax, otherwise the effect of Viagra will be weakened.