Triamterene nephrolithiasis: renewed attention is warranted.
 Although triamterene has been known to contribute to urinary calculus formation, it has been presumed to be a rare phenomenon.
 Our review of stone analyses performed during the last decade by a single laboratory reveals an increasing incidence of triamterene stones.
 Awareness of the calculogenic potential of triamterene-containing medications should be re-emphasized.
