Vidalista 20 Mg is a drug that’s commonly prescribed to treat erectile malfunction (ED) among men. Tadalafil is the active ingredient. It’s a PDE5 inhibitor. Vidalista 20, which is a PDE5 inhibitor, works by relaxing blood vessels within the penis. This allows increased blood flow to the area and results in a strong and lasting erection when sexual stimulation occurs. Vidalista should only be used as prescribed by a doctor.