At the first burning, stinging signs of cystitis, you need relief fast. This is where CYSTOPURIN can help. CYSTOPURIN is a low sodium 48 hour treatment for the symptoms of cystitis, & the sachets mix with water to make cranberry flavour drinks. It works by counteracting the acidity of your urine, helping to relieve the burning, stinging pain on passing water. Beginning the CYSTOPURIN treatment at the first signs of attack will usually help you feel better within a few hours. Not recommended for children less than 6 years old. If you have kidney disease, heart disease or high blood pressure, or are pregnant, seek medical advice before taking this product.