Was on Tamsulosin for 4.5 months. The first month was good, had a much better urine flow. But was never warned of side effects. After the first month I had mucous flowing like a river. Went to the doctor and was diagnosed with acute sinusitis. 3 weeks on antibiotics with no change, then the back pain started. 3 more weeks on a stronger antibiotic with no change. Finally was asked if I was taking any meds. Yes Tamsulosin I replied, it was then the side effect side of the drug came up. I stopped all medication save the Tamsulosin and the sinusitis remained. Then I had ED as well. The doctor wanted me to take another medication for it. I said no, stopped all treatment and began to take Saw Palmetto. The flow is still not up to par but only getting up once a night as it has been for 20 years now. Plan to go back to a different urologist after the new year and get checked. The specific medication was Harnal Ocas 0.4 milligram.