Flomax
"I had a 4.8 mm stone that had been plaguing me for 3 weeks. I had been taking pain medicines off and on as needed and drinking plenty of water but I could tell (plenty of experience) that the stone was hung up just before entering the bladder in the narrowest part of the ureter.  I called the urologist to ask for a prescription for Flomax.  They were hesitant - didn't think I could pass it.  Long story short, they prescribed, I took it, stone passed less than 24 hours later.  Flomax   pain medicines   plenty of water = passing kidney stone quickly and inexpensively."