What is Tadarise? Tadarise is a generic brand of the popular erectile dysfunction medication Cialis. The active ingredient in both medications is tadalafil. Tadarise is manufactured by Sunrise Remedies in India. How does Tadarise 20 work? Tadarise 20 works by relaxing the muscles in the blood vessels of the penis, which allows more blood to flow into the penis. This results in an erection. What...