For those who took Viagra. Below is an interesting webpage which indicates the correct way of taking Viagra and what else to take note of.
https://www.hims.com/blog/what-if-viagra-doesnt-work
So what if Viagra doesn’t work for you? Here are the potential reasons why:
You’re not using Viagra correctly.
You’re using a low dose of Viagra.
You’re giving up on Viagra too early.
Your ED is caused by an underlying health condition.
Porn is affecting your sexual performance.
Your ED is psychological.
Viagra isn’t the right medication for you.