Nausea, vomiting, loose stool, pseudomembranous colitis; maculopapular rash, urticaria; hypotension; neutropenia, decreased neutrophil, Hb or hematocrit; transient eosinophilia, thrombocytopenia, hypoprothrombinemia; headache, fever, inj pain, chills; transient elevations of LFT, SGOT, SGPT, alkaline phosphatase, bilirubin; transient pain, phlebitis.