To get an erection there must be some kind of sexual stimulation has to occur. I tend to think of natural supplements as the most effective treatment for erectile problems, until I came across research released in the Journal of Urology showing that certain natural products (or the way they're advertised) are actually containing phosphodiesterase inhibitors of type 5. Unknowingly, consumers are aware that these substances could cause dangerous interactions with Nitrates. It is clear how the organic health product sector must be more monitored. In a way it also demonstrates that, to date PDE5 inhibitors could be the best treatment for Erectile dysfunction.