Overview Medical Expulsive Therapy for Ureter Stone Using Naftopidil Status: Completed Trial end date: 2015-08-01 Target enrollment: Participant gender: Summary This study is to investigate whether naftopidil is effective or not for the spontaneous passage of ureteral stones with sizes of 3 to 10 mm. Phase: Phase 3 Details Lead Sponsor: Seoul National University HospitalCollaborator: Dong-A ST Co., Ltd.Treatments: AnalgesicsNaftopidil