Men with erectile dysfunction and impotence can use Vidalista 20 mg. Tadalafil, a component in this medication, and aids in boosting blood flow to the tissues of men's penises. Men use this medication to get longer, more powerful erections during sexual activity. This medication takes 36 hours to take effect. Only guys who are at least eighteen years old may use this medication. Follow your doctor's advice when taking this medication. Don't take this medication with cold beverages or fatty meals.