Tadalafil acts as the active ingredient in Vidalista 20 Mg. Vidalista 20 is to be taken 30 minutes before sex. After taking which its effect remains for 36 hours. This is one of the popular and widely used remedies for ED problem. Vidalista 20mg is the best tablets for sex. These pills are a drug for use by men only. So women should not use this drug.