After lithotripsy, how long does it take stone to pass?

Depend...: Do you mean eswl - extracorporeal shock wave lithotripsy? If so, the duration to pass sands and fragments disintegrated stones vary greatly from days to months depending upon the load and size of fragments. In some cases, procedures through urethra and ureter are required to remove the stuck/impacted fragments inside ureter. So, ask doc timely for individual variation and expectation.