Vidalista 20 mg falls under the class of medications known as PDE 5 inhibitors. It contains Tadalafil that impedes the activity of the PDE 5 protein and permits the blood stream appropriately to the penis. The compound cGMP which is answerable for the constriction and enlargement of veins is obliterated by the activity of PDE 5. Tadalafil present in Vidalista 20 blocks the activity of PDE 5 and doesn't allow it to annihilate cGMP. This builds the degrees of nitric oxide in the body with the goal that cGMP can be created appropriately. This permits the blood stream appropriately to the penis. As increasingly more blood streams to the penis, pressure is made. This prompts an erection.