What is Tadarise 20? Tadarise 20 is a generic form of Viagra, which is a medication used to treat erectile dysfunction in men. The active ingredient in Tadarise 20 is tadalafil, which is a PDE5 inhibitor. This means that it works by inhibiting the enzyme that breaks down cGMP, which is responsible for erections. Tadarise is taken orally, with or without food, and should be taken at least 30...