Thread: I use Viagra occasionally; it has amazing effect, and produce sex which I...

...never experienced before.? But Viagra cause redness in face. Is this problem or just cosmetic discomfort? Not having regular partner I use it just once every 1-2 weeks.

Thank you

It's a vasodilator. The mechanism of erections is very similar to flushing. By increasing blood flow to the penis, it causes erection. But it also increases blood flow everywhere else (just not as much)...hence flushing!