TY  - EJOU
AU  - Pursnani, Suraj 
AU  - Streeper, Necole M. 

TI  - Case of drug-induced kidney stone from overuse of phenazopyridine
T2  - Canadian Journal of Urology

PY  - 2024
VL  - 31
IS  - 3
SN  - 1488-5581

AB  - Drug-induced nephrolithiasis represents only 1%-2% of
stone cases. Here we focus on drugs capable of crystallizing
and forming stone, specifically phenazopyridine
(Pyridium/Azo). This is a case of a patient who presented
with a stone conglomerate in the right proximal ureter and underwent definitive treatment. Interestingly, the
stone had a purple hue with FTIR spectroscopy showing
stone composition of calcium oxalate (monohydrate and
dihydrate) and a material resembling phenazopyridine.
We retrospectively learned that she used multiple extended
courses of phenazopyridine over 3 months.
KW  - Pyridium
KW  -  nephrolithiasis
KW  -  drug-induced nephrolithiasis
KW  -  phenazopyridine

DO  -