Erectile Dysfunction (ED) in men can be treated with Vidalista. Tadalafil, the main component of the drug, is a phosphodiesterase type 5 (PDE5) inhibitor. The 20mg dose of Cialis is now available in a generic form called Vidalista 20. To help men achieve and maintain an erection during sexual stimulation, Vidalista 20 mg works by increasing blood flow to the penis.