Inj site pain, phlebitis; anaemia, hemolytic anaemia, thrombocytopenia, eosinophilia, leukopenia; nausea, vomiting, diarrhoea, enterocolitis, pseudomembranous colitis; bilirubinemia, abnormal hepatic function, jaundice; anaphylactoid reactions, anaphylactic shock; rash, itching; transient elevations of ALT & AST.