Viagra online and the process of buying it Viagra inhibits phosphodiesterase type 5 (PDE-5). By doing so, it decreases the effectiveness of a muscle-building enzyme. This muscle enzyme is a natural part of the body’s immune system, an important and essential part for the erection-promoting responses that testosterone provides. In our pharmacy, you can buy Viagra online cheap from the manufacturer. The PDE-5 enzyme controls the activity of a chemical in the body, known as dopamine, which is involved in […]