Tadacip 20 mg is a medication used to treat erectile dysfunction (ED) in men. The active ingredient in Tadacip is tadalafil. Like sildenafil citrate (found in Viagra) and vardenafil (found in Levitra), tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor. The usual recommended dose is 20 mg, taken before anticipated sexual activity. The timing of administration may vary based on individual response, but Tadacip can be taken with or without food.