Vigora 100 contains Sildenafil Citrate, which blocks the consequences of PDE five. This allows blood to circulate. It prevents the destruction of Cyclic Guanosine monophosphate (cGMP) that is chargeable for blood vessel contraction and dilation, as well as PDE five. This will cause blood for an smooth go along with the go with the glide to the penis. The pressure that results in an erection is improved as more blood flows to the penis.