When it comes to the treatment of erectile dysfunction, Vidalista 20mg is one of the strongest drugs available. Vidalista 20mg is available in a variety of strengths and dosages. With tadalafil 20mg as the active ingredient, this drug blocks the effects of phosphodiesterase type 5. When you want an erection, it is because of the PDE5 enzymes present in your penis. The prescription drug Vidalista 20mg blocks the activity of phosphodiesterase5 (PDE5). It helps you get an erection by controlling an enzyme in your penis.