Exclusion
  1. Non-randomized studies
  2. Case reports, editorials, letters and reviews.
  3. Studies in pediatric age group (age< 18 years) will be excluded.
  4. Not containing data on stone expulsion rate at the completion of study.
  5. Use of uncommonly used drugs such as terazosin, doxazosin and anticholinergics
Studies were then selected for full-text review following initial title and abstract screening. Full-text review was then performed and studies satisfying inclusion and exclusion criteria were included in review. At any point of discrepancy between two study authors arbitration with other study authors was done (ST & TP).