Vidalista 40 is the best drug to solve any problem that arises during intercourse. Tadalafil acts as the active ingredient in Vidalista 40. Vidalista 40 is ED's best drug. Vidalista 40 is taken 1 hour before intercourse, after which the effect lasts for 4-5 hours. Vidalista 40 is a widely used drug to treat the problem of impotence.