Men's tenacious inability to lift and comfort during sexual activity is erectile dysfunction. Tadarise 20 has an active ingredient similar to the branded version of the drug Cialis. Tadarise (generic Cialis) contains tadalafil, a phosphodiesterase type 5 (PDE5) inhibitor, used to treat erectile dysfunction in men. The Tadarise pill should be consumed within an hour of the start of sexual activity.