Tadarise is most commonly used to treat ED, helping men who have difficulty achieving or maintaining an erection during sexual activity.  In some cases, Tadarise may also be used to treat symptoms of BPH, a condition where the prostate gland becomes enlarged and causes urinary problems, such as frequent urination or difficulty urinating. Tadalafil works by relaxing the muscles in the prostate and bladder, making it easier to urinate  . blood vessels and allows increased blood flow to the penis, leading to an erection.