Inj site pain; anemia, hemolytic anemia, thrombocytopenia, eosinophilia, leucopenia; nausea, vomiting, diarrhea, enterocolitis, pseudomembranous colitis; bilirubinemia, abnormal hepatic function, jaundice; anaphylactoid reaction & shock; transient elevations of ALT & AST transaminases; rash, itching, other skin reactions.