Vidalista 20 mg is a medication used to treat erectile dysfunction (ED), containing tadalafil as its active ingredient. Tadalafil belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. Tadalafil is known for its longer duration of action compared to other ED medications like sildenafil (Viagra), making it a preferred choice for men who anticipate regular sexual activity over a longer period.