Tadarise has the same active ingredient as the branded version of the drug Cialis. Tadarise starts working within 30-60 minutes after ingestion and its effects last for up to 36 hours. Tadarise 20mg is for erectile dysfunction medication, based on tadalafil. This occurs many erections during this period, that is why Tadarise 20 is most useful in erection and easily available around the world.