Sex File: Is taking Viagra for fun harmful?

Viagra - medication for erectile dysfunction. 

My boyfriend, who is 36, takes Viagra even though he doesn't need to. I don't think he needs it but he says he likes it because it makes him feel like a teenager again. Are there any long-term effects? Is there a danger that he will become reliant on it for a good sex life?

The answer to both your questions is yes. A study conducted at the University of Texas in Austin in 2006 showed that men who used an erectile dysfunction medication (EDM) such as Viagra recreationally were two and a half times more likely to have erectile difficulties.