özgün cialis resmi sat?? sitesi bu konuda hastalara uyar? dokumayor. Bu ilac? kullanmadan önce doktora veya eczac?evet dan??mak gerekiyor.When sexual stimulation causes local release of NO, inhibition of PDE-5 by sildenafil causes increased levels of cGMP in the corpus cavernosum, resulting in smooth muscle relaxation and inflow of blood to the