“ PDE5 is an enzyme establish in the main in the unruffled brawn of the
corpus cavernosum that selectively cleaves and degrades cGMP
to 5′-GMP. PDE5 inhibitors are like in structure to cGMP; they competitively adhere to PDE5 and subdue
cGMP hydrolysis, thus enhancing the effects of NO.
This step-up in cGMP in the smoothen brawn cells is responsible for prolonging an erecting. http://lm360.us/ ”