Sildenafil, Tadalafil, and other PDE-5 inhibitors, Vardenafil's monohydrochloride (HCl) salt, which is Buy vilitra 20mg active ingredient, also increases penis blood flow. This Buy vilitra 20mg controlled with the PDE5 inhibitor impedes the activity of the PDE5 catalyst and helps in the development of cGMP and gas inside the body. Healthy erections are possible because the CGMP produced dilates the blood vessels and smooth muscles in the sexual organ, allowing for an increased flow of blood and gas when sexually stimulated. Nitric oxide (NO) is released in the corpus cavernosum as a result of the stimulation, resulting in an increase in the concentration of cyclic guanosine monophosphate (cGMP) molecules. The penile muscles need these CGMP molecules to relax and dilate, allowing more blood to flow.