I take flomax (tamsulosin) for frequent night urination. However, why did the condition improve only after I stopped the flomax (tamsulosin). It was d/c by my eye surgeon.

Flomax (tamsulosin) Nocturia is but one symptom of bph. I would be concerned that you are not emptying your bladder completely now that you have stopped the flomax (tamsulosin). There also long-term consequences on bladder thickening and irritability as a result of stopping the flomax (tamsulosin). See a urologist for further testing to determine how much you need the medication. Your ophthalmologist likely only needed you to stop the medication to facilitate cataract surgery.