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To understand how Viagra works we need to understand how an erection comes about. Nitric Oxide viagea is released with sexual stimulation from nerve endings and endothelial cells in the corpus cavernosum of the penis. An enzyme then converts guanosine triphosphate (GTP) into cyclic guanosine monophosphate (cGMP). cGMP causes the smooth muscle of the penis to relax, which causes an inflow of blood which then leads to an erection. cGMP is then hydrolysed back to the inactive GMP by phosphodiesteras type 5 (PDE5). Men who suffer from gynaikeio viagra coupon dysfunction often produce rszeptfrei little amounts of NO.

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Cialis used to have free trial prescriptions.

It is still improving and penis (girth) size has increase. IF YOU ARE PERSISTANT (4-5xmin a week for 6mons min) IT WORKS. I am at 8mos GOOD LUCK.

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