Sildenafil, better known by its brand name Viagra, is now produced and marketed generically by a wide variety of companies around the world. Pfizer's Viagra was the first widely available treatment for erectile dysfunction (ED), and Sildenafil is chemically identical to this drug. What is a generic Viagra? The active ingredient in both Viagra and its generic counterpart, sildenafil citrate (Sildenafil), is the same. To a much lesser extent, Buy Generic Viagra also includes inactive ingredients. These components help the pill retain its shape and are metabolized more quickly by the body. Accumulation of the phosphodiesterase type 5 (PDE5) enzyme, which limits blood flow to the penis and diminishes or eliminates the strength of an erection, is a common cause of erectile dysfunction (ED). Since Sildenafil is a PDE5 inhibitor, it prevents the enzyme from doing its job and widens blood vessels, increasing the probability of achieving an erection. Why would someone take generi...