IRCT2013113015597N1 IRCT 2014-02-19 Tabriz University of Medical Sciences Efficacy of Tadalafil on Lower Urinary tract Symptoms of patients with ureteral stents Comparison of effectiveness of Tadalafil versus placebo on lower urinary tract symptoms in male patients with ureteral stent, A randomized controlled trial 2013-12-06 anticipated 80 Complete https://irct.ir/trial/14824 interventional Randomization: Randomized, Blinding: Triple blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: Tadalafil and placebo were packed by pharmacologist colleagues in similar packages of 35 identical numbers, and as A1, B2, B3, A4 ... were encoded. None of physicians, nurses, patients and statistical analyzers is aware of Coding method. The patients receive one of the packages randomly. 2-3 LUTS associated with ureteral stents. Intervention 1: In the intervention group, tadalafil tablet (Chemidarou company) 10 mg once daily is given for 4 weeks by oral route. Intervention 2: In the control group, a placebo tablet (same shape, size and color of tadalafil which was made from starch by Pharmacy faculty of Tabriz University of Medical Sciences) is given for 4 weeks by oral route.