How To Use Cystopurin Sachets For CystitisAdults and children over 6 years of age can use Cystopurin.Empty the contents of one sachet into a glass of water (200ml) and stir until granules have dissolved in the water.Take one sachet, three times daily for two days to complete the treatment course.If symptoms persist longer than 48hrs, consult your doctor.Each sachet contains 3g potassium citrate.