Tadalis SX 20 mg contains tadalafil 20 mg, a PDE-5 inhibitor used primarily for erectile dysfunction (ED). It works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. It does not increase sexual desire by itself. A wellness-focused approach can complement medical treatment for ED. Regular physical activity, maintaining a healthy weight, eating a balanced diet, stopping smoking, limiting alcohol, and managing stress can improve general cardiovascular health and may also improve erectile function.