Answer
Kidney impairment increases the risk of dangerous potassium accumulation. Some products are contraindicated at specified levels of impairment, so renal function must be checked before prescribing or supplying it.
Sources for this answer
- Renodyra 1080 mg modified-release tablets — Current selected SmPCemc · Summary of Product Characteristics
- Cystopurin 3g granules for oral solution — Current selected SmPCemc · Summary of Product Characteristics