Answer
Sulfadiazine can form crystals in urine. Adequate fluid intake helps maintain urine flow and lowers this risk, unless fluids have been restricted for another condition.
Sources for this answer
- Sulfadiazine 500mg Tablets BP — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.