To determine whether the administration of tamsulosin, as adjunctive medical therapy, increases the efficacy of one session of extracorporeal shock wave lithotripsy (ESWL) to treat renal stones. Material & Method: A prospective randomized placebo controlled study enrolled 21 patients. They underwent a single ESWL session to treat solitary radiopaque renal stones 4 to 20 mm in diameter. After E…