Vigora 100 Mg is designed to help men with ED achieve and sustain an erection during sexual activity. It does this by increasing blood flow to the penis, which is crucial for the physiological processes that lead to an erection. Sildenafil Citrate, the active component of Vigora, is a PDE5 inhibitor. It works by inhibiting the enzyme PDE5, which can lead to the relaxation of the smooth muscles in the penis, allowing for increased blood flow.