Urotropine Horseradish Tablets should not be taken for a long period of time. Long-term administration is not recommended as there is a possibility of accumulation in the urinary system. Urotropine Hippuric Acid Tablet hydrolyzed to formaldehyde and horse uric acid in weakly acidic urine, with broad-spectrum antimicrobial effect, is used for the prevention of lower urinary tract infections in patients with indwelling urinary catheters. Adverse reactions such as nausea, dysuria, vomiting, hematuria, dysuria, cystitis, proteinuria, dysuria, gastrointestinal discomfort, and burning sensation at the urethral opening may be observed after administration of the drug. Since the drug has to work in conditions where the urine is weakly acidic, the pH of the urine should be kept below 5.5 and milk, cheese products, citrus fruits and other alkaline foods should not be consumed. The adverse effects of the drug are reduced when combined with sodium bicarbonate, but its efficacy is also reduced. It is contraindicated in case of hypersensitivity to the drug; in case of severe hepatic or renal insufficiency; in case of dehydration. Use with caution if allergic to aspirin; use with caution in pediatric patients; use with caution in pregnant and lactating women. If you need to use the drug patients, please under the guidance of the doctor strictly follow the instructions of the doctor to take medication, do not self-medication.