Prevention of Bladder infection
"Macrodantin was prescribed to me to prevent UTI . I only have to take one when needed. During one month I got four fever attacks with chills, headaches and muscle cramps. Very much like flu symptoms . It goes on for 2 days then I am fine again.  Eventually I realised that it might be this medication since I took one on a Friday evening and the next day when I woke up I got this horrible symptoms again  I read about the side effects and realised that this might be the cause."