Tadalafil acts as the main ingredient in Vidalista 40 pills. Vidalista 40mg is taken one hour before sex. The effect lasts for 36 hours after taking Vidalista 40 Mg. Vidalista 40 is widely used by men. Vidalista 40 Mg is widely used to solve the problem of ED. Vidalista 40 should be kept away from small children and pets.