I'm presently taking .4mg flomax for BPH and the side effects are fairly severe: lack of muscle strength, almost constant stuffy nose, problems falling to sleep. I tried to lower the dose by making my own .2mg capsules, but the morning retention and frequency at night got worse. I have taken cialis at 2.5 mg daily for bph but it didn't help enough. Would be interested if the 5mg /day of cialis works on the bph as well as flomax, but with less side effects.