I was prescribed Flomax for my need to urinate frequently during the night. Once again I learned that even though your doctor has all your medications in the chart he may not look at that. Fortunately I survived despite taking other medications that lower blood pressure. I have been taking 2 hs. Tonight I will not take any. Important to note, My CPAP physician explained how the cpap helps reduce urinary urge during sleep. I had been using an oral device for sleep apnea. Now, with CPAP I have to urinate only once or twice during six hour period.