This study is being done to answer the question: What is the impact of a medication called tamsulosin (also called Flomax) on the rate of postoperative urinary retention (POUR) and catheter-associated urinary tract infection (UTI)? One of the most common complications following surgery and associated with Foley catheters is post-operative urinary retention (POUR) after the catheter is removed. This is defined as being unable to urinate spontaneously within 8 hours following the removal of the indwelling Foley catheter (the catheter that sits in your bladder to drain urine after surgery). When this happens, it requires intermittent straight catheterization of the bladder (placing a temporary catheter in the bladder to drain the buildup of urine), which can cause a lot of discomfort and anxiety, as well as increase the risk of catheter-associated urinary tract infection (CAUTI).