Which stone is common in chronic laxative use:
Xanthine
Cysteine
Ammonia urate
Struvite
Ans. c. Ammonia urateRef: Campbells Urology/P. 210Chronic laxative use leads to decreased sodium in the urine, as most sodium is excreted by GIT.Hence urate binds more with ammonia and this leads to ammonia urate stones.
G.I.T