Anaphylactoid reaction, shock; nausea & vomiting, loose stools, pseudomembranous colitis; maculopapular rash, urticaria; hypotension, vasculitis; slightly decreased neutrophils, reversible neutropenia, +ve direct Coombs' test, decreased Hb or hematocrit, transient eosinophilia & thrombocytopenia, hypoprothrombinemia, leucopenia; pruritus, SJS; hematuria; headache, fever, inj site pain & chills; transient elevations of SGOT, SGPT, alkaline phosphatase & bilirubin; transient pain, phlebitis.