Mg can keep sildenafil citrate, which is used to treat erectile dysfunction in males, in place. We find a lot of high blood pressure instances. This medicine is manufactured entirely in a laboratory in the United States. The pill has a therapeutic action that happens instantaneously during erection, and when the flow of blood is decreased by the PDE-5 enzyme, blood rushes into the penis and a portion of the penis relaxes. It is the primary cause of this enzyme. A chemical is known as cGMP.