Tadarise of the active ingredient Tadalafil. This medication works by preventing the action of the enzyme phosphodiesterase-5 to widen or relax blood vessels and improve blood flow to the penis. The increased blood flow leads to an erection. The medicine will only help in the erection process, but sexual stimulation is needed for it to work. Tadalafil also helps BPH by relaxing the muscles in the prostate and bladder area to improve blood flow.