Vidalista 20 is one medication that is commonly used to treat male erectile dysfunction. An erection triggered by sexual stimulation. It works by blocking the activity of a chemical called phosphodiesterase type 5. This can help relax blood veins and increase blood flow to the penile region, which makes it easier to react to sexual stimulation. This medicine helps men get and sustain a harder erection when sexual stimulus is present. Patients are typically instructed to take one pill 30 to 60 minutes before sexual activity. Using this medicine by anyone younger than 18 is not advised.