Do you know what drug Tadacip 20 is used for? Tadarise 20 mg is used once a day. These pills are taken 30-35 minutes before intercourse. Tadalafil acts as the active ingredient in Tadacip 20. Tadacip 20 is most commonly used by men. Tadacip 20 is one of the best tablets for sex. Tadacip should not be used by those under 18 years of age.