I don't know about four days, but definiately feel the effects 36 hours later. BTW: as you may already know, Viagra doesn't directly widen any blood vessels. It just prevents the body from prematurely narrowing them.
Thanks for the comment Rick. I'm curious though, is this prevention of narrowing the blood vessels known to cause any types of long-term risks in a guy at my age (23)? I honestly enjoy using it once in a while as a performance enhancer but don't know if this would cause long term side-effects, such as not being able to get it up on my own and becoming dependent on the drug for getting an erection. I know some people think it doesn't but I've also heard other stories and wanted to get an additional opinion. Thanks.
Ricky or WaringBlender,
Below is a link to an article I found highlighting that Viagra can permanenty damage the valves in the penis leading to permanent impotence especially in young men who take it more as a performance enhancer. I was wondering if there was any truth to this. While I have not had a persistent erection for 24 hours, my guy has definately appeared to be fuller and have a larger girth than previously. Just something to think about. Let me know your thoughts.
http://www.articlecity.com/articles/men/article_242.shtml
Im not not sure if u have ever heard of this pill called the RC pill but u purcahse it at an adult sex store its cost about $7 it last for 48 hours and it doesnt make u hard wat is does is when u get hard it makes u stay hard much longer then wen ur done it goes back down and any time u get hard during that 48 hours u will b hard much longer i use it to spice stuff up in the bed room and the ladies love it