Cenforce 100 mg works by increasing blood flow to the penis during sexual stimulation. It relaxes the smooth muscles in blood vessels, allowing improved circulation so that a firm erection can be achieved and maintained. It does not cause sexual arousal on its own—sexual stimulation is still required. This is considered a standard full-strength dose of sildenafil and is often prescribed when lower doses such as 25 mg or 50 mg are not effective. It is usually taken about 30 to 60 minutes before sexual activity, and its effects typically last for several hours.

https://www.genericday.com/cenforce-100-mg.html