Tadalafil (generic) is the main active element in Vidalista 20 mg. What is Tadalafil, then? It is a PDE-5 inhibitor (Phosphodiesterase Type-5) medication intended to naturally increase male libido. This primary component relaxes the pelvic floor muscles and widens the blood vessels in the genitals. In addition, it eases lung tension and relieves stored pressure, enabling males to participate in sexual activity. Secondly, it increases and inhibits the breakdown of the cGMP enzymes, maintaining a steady flow of blood to the genitals.