Male erectile dysfunction (ED) is treated using the drug Vidalista 20. Tadalafil, an inhibitor of phosphodiesterase type 5 (PDE5), is the active component of this medication. Usually, 30 minutes before planned sexual activity, it is taken orally with water and food or not. Since Vidalista 20 is a prescription drug, it should only be used under a doctor's supervision and advice. Before writing a prescription, your doctor will review your overall health, medications you currently use and medical history.