Tadarise 20 mg is a medication used to treat erectile dysfunction (ED) in men. It contains tadalafil, which is the same active ingredient found in Cialis. Tadalafil, the active ingredient in Tadarise, inhibits the enzyme phosphodiesterase type 5 (PDE5). Tadarise increases the levels of cyclic guanosine monophosphate (cGMP), which relaxes smooth muscles and increases blood flow to the penis, facilitating an erection during sexual stimulation.