Tadalafil is the active ingredient in Vidalista 80 mg, a powerful generic drug that is mainly used to treat male erectile dysfunction (ED).  By boosting blood flow to the penis during sexual stimulation, this phosphodiesterase type 5 (PDE5) inhibitor promotes a hard and long-lasting erection.  Because of its 36-hour half-life, Vidalista 80 is known as "the weekend pill."...