Vidalista 20 is used to treat men with sexual problems. The active ingredient in this drug is tadalafil, which works to relax the muscles by increasing blood circulation in the penis. This medicine can be used 1 hour before intercourse to enjoy a satisfactory erection. The effect of this medicine varies from person to person for up to 30 minutes. The effect of this medicine usually lasts for 36 hours. This medicine should be used only in men above 18 years of age.