Tamsulosin
"This was my third kidney stone. The first two (3mm) were very painful and I used pain killers, no flomax. The ER did a CAT scan and said this stone was 5 mm and located at the junction between the ureter and kidney, and was causing mild hydronephrosis. They gave me flomax and pain meds. I do not like to take medicine and since pain was bearable at that point, I just took the flomax not the pain meds. I was skeptical since the FDA has only approved Flomax in men with prostate issues but doctor explained it helps the ureter stretch. I took it in the evenings after dinner and had no noticeable side effects. Took about two weeks, but stone passed and I never took a singe pain pill - did drink tons of water, had a bit of cramping, that's all!"