urinary tract infection
"Second time I have had this tablet nitrofantenoin side effects were nasty this time round down right horrible. After 2 days headache started quite bad, shaky, anxious, irritable dreadful nausea was sick once. Chills. After 4 days feel I have a dreadful illness fast heartbeat stopped taking tablets. Still feel anxious & crying and getting upset so easily. The headache has come back as the day has worn on. Maybe it's fading. I hope so?  Will never take this tablet again. UTI gone."