Inclusion Criteria:  Renal stone ≤ 20 mm. Lower calyceal stone ≤ 15 mm  Exclusion Criteria:  Women with known or suspected pregnancy or breastfeeding. History of alpa-blockers (more than 7 days prior to study participation) History of ureteral stricture Multiple (that is more than 2) stones Stone in solitary kidney (either anatomically or functionally). Presence of urinary sepsis. Estimated glomerular filtration rate < 30 ml/min Contraindication or allergy to tamsulosin