Tadact 20 mg is a medication primarily used to treat erectile dysfunction (ED) in men. Its active ingredient is tadalafil, a phosphodiesterase type 5 (PDE5) inhibitor that helps improve blood flow to the penis, facilitating an erection during sexual arousal. Tadact is also sometimes prescribed for the treatment of benign prostatic hyperplasia (BPH), a condition characterized by an enlarged prostate.