bacterial infection
"Multiple severe side effects, including severe fatigue,  diarrhea,  muscle pain, confusion and anxiety.  Do your research!   This is a dangerous drug.  Took only four doses before I  ended up in the ER.  I am still recovering four days later and don't know  how long it will take for a full recovery.   Use only as a last resort, e.g., NOTHING else will work and you're close to death. ....and even then think twice.  Not kidding. ...side effects are absolutely terrible."