Nausea, vomiting, diarrhea, dyspepsia, abdominal pain, flatulence, anorexia, dysphagia; dizziness, headache, weakness, insomnia, agitation, tremor; hypersensitivity reactions; interstitial nephritis, renal failure, polyuria, urinary retention, urethral bleeding, vaginitis, acidosis, eosinophilia, leucopenia, leucocytosis, anemia, granulocytopenia.