I am considering the possibility that there are two problems. One is a problem with the prostate which is increased
in size and is causing obstruction
in flow. The other problem is on the bladder, which may be unable to maintain holding urine, so occasionally you wet the bed. It is simpler to think that the root of the problem would be the obstruction of flow, and so removal of the obstruction would solve everything.
The Flomax is aimed at reducing the size of the prostate.