Dette forekommer også i forbindelse med andre uratsænkende lægemidler.
Xanthine deposition As with other urate lowering medicinal products, in patients in whom the rate of urate formation is greatly increased (e. g. malignant disease and its treatment, Lesch-Nyhan syndrome) the absolute concentration of xanthine in urine could, in rare cases, rise sufficiently to allow deposition in the urinary tract.