Tamsulosin
"Have suffered with uric acid kidney stones for years, approximately every 4-5 months. Pain usually bad enough to go to ER.  Today I had an attack and decided to take some Flomax. The ER usually sends me home with a prescription but have never been given Flomax at hospital.
AMAZINGLY, within an Hour and a half I passed the stone!  This has never happened so quickly as it usually does not pass till the next day!  Next time I have an attack (and unfortunately there will be a next time) I am reaching for Flomax right away.  Still cannot believe this happened."