Shock; hypersensitivity; granulocytopenia, eosinophilia, thrombocytopenia; increased SGOT, SGPT, alkaline phosphatase; renal insufficiency; severe colitis eg, pseudomembranous colitis (presence of blood in stool), abdominal pain/discomfort, diarrhea, heartburn, anorexia, nausea, satiety, constipation; interstitial pneumonia or PIE syndrome, fever, cough, dysonea, abnormal chest x-ray, eosinophilia; stomatitis, candidiasis; vit K deficiencies eg, hypoprothrombinemia, bleeding tendencies or vit B group deficiencies eg, glossitis, stomatitis, anorexia, neuritis; headache, dizziness.