It is used to dissolves and soothe the passing of stones and thus it is called an anti-lithic.
Traditional and conventional uses of gravel root cite its use for urinary tract ailments and bladder infections. Gravel root has also been used in the alleviation of painful bouts of urination (dysuria), possibly due to its soothing, astringent properties on the mucus membranes of the urinary tract.
Historically it has also been used in the treatment of gout and arthritis.
I use it in the Sereni tea, the kidney tonic tea.