almost one month ago my friend was put on 250 mg of keflex every day to keep uniary tract infections at bay.. last thursday she got severe chills followed by fever then got severe diarehha and stomach cramps. she didn t go to the doctor and it left her very weak and without an appitite i encouraged her to drink plenty fluids she started feeling wednesday but that evening she had a severe beet red rash on both legs solid went to the hospital and was diagnosied with vasculitis she was very nervous and confused through this time and still is some she is 85 she stayed one night and to follow up wioth her doc this week