bladder infection
"I took one dose and within about 3 hours the blood started to clear from the urine and pain lessened; however, soon I got a bad headache, nausea, and chills.  Within about 12 hours from the first (and only)dose I was in the hospital--vomiting and feeling miserable.  Was there for 3 days taking a different antibiotic and fluids by IV.  One week later bad diahrrea, and pain in knee joint.  Must be allergic to Cipro--will remember that for sure!"