I'm on Tamsulosin permanently following my RT. The only side-effect I have is lowered blood pressure, which is beneficial in my case because my BP was too high previously. Now I'm on Tamsulosin it's in the normal range, so a benefit. It's an absolutely wonder drug as far as I'm concerned. If I ever forget to take my daily tablet then I'll know about it later the next day because of the noticeable difficulty in urinating.
Chris