Each pack of Cystopurin contains 6 sachets of powder, low in sodium and with natural cranberry juice extract, which you simply mix with water to make cranberry flavoured drinks. Cystopurin contains potassium citrate which neutralises the acidity of the urine. This helps to relieve the burning, stinging sensation when passing urine & reduces the urge to urinate so frequently, both of which are common symptoms of cystitis.