This is a letter from the man John whom he wants to bring his message to the world!

:)With age, my health deteriorated, and for which I had a problem with erection.

But I find are the solution!

Tadalafil is an effective, reversible selective inhibitor (neutralizer, acting selectively) of specific phosphodiesterase type 5 (PDE5) cyclic guanosine monophosphate (cGMP).

When sexual arousal causes the local release of nitric oxide, inhibition of PDE5 by tadalafil leads to an increase in cGMP levels in the cavernous body of the penis.

The result is a relaxation of smooth muscles of the arteries and blood flow to the tissues of the penis, which causes an erection.