Overview Effects of the Use of Adjuvant Drugs After Extracorporeal Shockwave Lithotripsy (ESWL) in Renal Calculus Status: Unknown status Trial end date: 2010-12-01 Target enrollment: Participant gender: Summary The investigators objective is to study if some drugs can improve the success rate of extracorporeal shockwave lithotripsy for renal stones. Phase: Phase 3 Details Lead Sponsor: University of Sao Paulo General HospitalCollaborator: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior.Treatments: NifedipineTamsulosin