Tadalafil acts as the active ingredient in Tadarise 20 tablets. Tadarise 20mg is taken to you one hour before sex, after which the effect lasts for 36 hours. It is important to consult a doctor before taking Tadarise 20mg. Tadarise 20 is the best drug to solve the problem of impotence. Tadarise 20 Mg must be taken once in 24 hours.