Is it ok to start using cialis or Viagra from 30s?

[Very late]

I am a 31 year old guy and I dont have very strong erections, well as long as I stimulate my penis, I have erection but if I dont, I usually lose erection, or in changing positions in sex, I lose erection, or its difficult to wear condoms cause again I will lose erection..

Is it ok to try a small dozage of Cialis or Viagra?
Will I lose my natural power of getting erection?

[tinmuning]

Viagra doesn't seem to affect natural erection, however, you have to assess if you are really in need of this drug, otherwise, it would be pointless to do so. Healthy individuals are taking this drug for recreational use, thinking it would potentiate their sexual performance. This is only for people who can't sustain an erection long enough to complete intercourse. If the problem is not achieving erection after having intercourse twice in row, then the drug won't help you. There are other aspects which can affect erection too.