benign prostatic hyperplasia
"I had to stop taking Flomax because it made my sinuses completely clogged. I could not sleep because I had to keep my mouth open to breathe, which caused dry mouth and sore throat. Never got any sleep on it. It also caused retrograde ejaculation, where the semen goes back into the bladder instead of out the end of the penis. The short time I was on it helped the urination a little but, but not a lot."