The Tadareen-20 Tadalafill 20mg Tablets relax muscles of the blood vessels and increases blood flow to particular areas of the body. Tadalafil under the name of Cialis is used to treat erectile dysfunction (impotence) and symptoms of benign prostatic hypertrophy (enlarged prostate). Tadalafil is used to treat the symptoms of two conditions found in men: benign prostatic hyperplasia (BPH) and erectile dysfunction (ED). It is a medication used to treat erectile dysfunction. The drug is based on the theory of blocking the enzyme phosphodiesterase or PDE5 blocker as the enzyme. The Tadareen-20 Tadalafill 20mg Tablets are very useful.