Vidalista 20 mg: What is it? Phosphodiesterase5 (PDE5) inhibitor Vidalista 20 mg is a medication. The active ingredient in the medication, tadalafil, is remarkably successful in treating erectile dysfunction.  By controlling the PDE5 enzyme in the penis with 20 mg of Vidalista at once, you can erect. The medication no longer addresses STDs, and it is always a wise decision to use a...