The generic Cialis medication Vidalista 2.5 mg contains tadalafil. The main conditions that tadalafil is used to treat are benign prostatic hyperplasia (BPH) symptoms and erectile dysfunction (ED). A class of medications known as phosphodiesterase type 5 (PDE5) inhibitors includes tadalafil. In order to sustain an erection, these medications increase blood flow to the penis during sexual stimulation.