The mainstays of renal colic medical treatment are first to provide efficient pain relief, and second to facilitate migration of the ureteral stone or dissolve it. In the ambulatory setting, non steroidal anti-inflammatory drugs are the treatment of choice of pain relief. To facilitate stone migration, the debate between hydric restriction and hyperhydration remains somewhat open. Besides that, alpha-blockers and anti-calcic agents appear to speed up stone explusion, whereas stone chemolysis acts on a longer time scale.