Viagra 50 mg kullan?c? yorumlar?na bak?ld??? zaman kullan?c?lar teamüle yarad???n? belirtmi?lerdir. Ancak taraf etkilerine bakarak kontrollü kullanmakta fayda var.Normally, an erection goes away when PDE5 breaks down the cyclic GMP in your penis. But Viagra blocks the action of PDE5, so it allows cyclic GMP to keep working for a longer period of