If medication is not successful, a minimally invasive treatment option using cooled thermotherapy (Targis Microwave) is available. This in an in-office treatment performed under light sedation. A local anesthetic is placed in the patients bladder; a specialized catheter equipped with a microwave antenna is positioned in the urethra; then a computer-controlled treatment protocol is begun. The treatment lasts between 30 and 60 minutes. During the treatment, microwave energy is applied to the enlarged area of the prostate, while cooling fluid protects the urethra. Over the next 6 to 12 weeks, the heated prostate tissue dissolves, relieving the previous obstruction.