Click Here To Visit Official Vidalista 20 Vidalista 20 mg is a generic medication administered orally for the treatment of erectile dysfunction. This medication belongs to a group of drugs known as PDE5 inhibitors and has Tadalafil as the active ingredient which is the same as that in Cialis. Tadalafil directly acts on the enzyme responsible for the erection of the penis to provide relief from ED. The drug is effective for attaining a firm erection only in the presence of sexual arousal.