Cystopurin is a low-sodium 48 hour treatment for the symptoms of cystitis. Each pack of Cystopurin contains 6 sachets, which mix with water to make cranberry flavoured drinks. There is no doubting a real attack of cystitis. Each woman may vary in the ferocity of her symptoms, but some of the following will always occur: Initial urethral twinging leading to knife-like pain on passing urine Frequency of passing urine leading to urgency as well Neither of these are pleasant, especially if they occur frequently & they can be inconvenient, incapacitating & often frightening; more so when far from a toilet, home or doctor. Then other symptoms of cystitis may join the first two, these are: Blood in urine Smelly/foul smelling urine Cloudy or dark urine Abdominal pain or back-ache Fever, temperature & weakness