Hello. Please share your usg report. Ureteric stone can cause hydronephtosis (which leads to kidney damage). I think you have shown to a urologist and he has started you on tamsulosin/alfuzosin. These drugs have a known side effect of retrograde ejaculation ( the problem you are facing, no ejaculate) You need not worry about ejaculate as it will become normal when you stop these medications. However you need to be cautious about your stone