It depends exactly what you think the benefits are. After all, it is valuable for treating Crohn's disease and heart problems, too.
But assuming you're only interested in the impacts upon sexual function, yes some men will find Viagra increasingly ineffective after using it long term. However, often it becomes ineffective as a result of other physical changes or even emotional reasons (problems in the relationship). What's also possible, is that long-term use may cause a man to always become dependent on the pill to have the desired affects; he simply can't ever perform without it.
So if a man has been taking Viagra a while and it doesn't seem to do for him as it used to, he should consult his doctor to find out if there is an underlying physical cause that can be treated separately. Also, some men are simply never responsive to Viagra, and taking double the dose will not enhance the possible benefits, but rather increase any unpleasant side effects.
But assuming you're only interested in the impacts upon sexual function, yes some men will find Viagra increasingly ineffective after using it long term. However, often it becomes ineffective as a result of other physical changes or even emotional reasons (problems in the relationship). What's also possible, is that long-term use may cause a man to always become dependent on the pill to have the desired affects; he simply can't ever perform without it.
So if a man has been taking Viagra a while and it doesn't seem to do for him as it used to, he should consult his doctor to find out if there is an underlying physical cause that can be treated separately. Also, some men are simply never responsive to Viagra, and taking double the dose will not enhance the possible benefits, but rather increase any unpleasant side effects.
