Tamsulosin, also known as Flomax, is a medication being studied to see if it helps older men who have surgery and need a catheter, which is a tube placed in the bladder to drain urine. After surgery, some men may have trouble urinating on their own, called post-operative urinary retention (POUR). This study also looks at catheter-associated urinary tract infections (CAUTI), which is an infection that can happen if the catheter is used for too long.

The study involves men aged 50 and over, who are having surgery on their liver, colon, or other nearby organs. They cannot be part of the study if they are already taking tamsulosin, have certain health conditions, or if their surgery involves parts of the urinary system. The goal is to see if taking tamsulosin reduces the need for an extra catheter or infections.

• Participants must be male, aged 50 or older, and having specific surgeries.
• Excludes men already on tamsulosin or with certain health issues.
• The study aims to reduce discomfort and infection after surgery.