Tadfil 20 mg is a medication commonly used for the treatment of erectile dysfunction (ED) in men. It contains tadalafil 20 mg, a PDE-5 inhibitor that helps improve blood flow to the penis during sexual stimulation. This may help men achieve and maintain an erection. Tadalafil works by relaxing blood vessels and increasing blood circulation in penile tissue when a man is sexually aroused. It supports the natural erection process but does not increase sexual desire and does not cause an erection without stimulation.