Local inj site reactions, systemic allergic reactions, rash, pruritus, urticaria, erythema multiforme, SJS, TEN, abdominal pain, nausea, vomiting, diarrhea, pseudomembranous colitis, reversible thrombocythemia, eosinophilia, thrombocytopenia, leucopenia, neutropenia. False +ve Coombs' test result; increased bilirubin, transaminase, alkaline phosphatase & serum LDH; headache, paresthesia, convulsion, oral & vag candidiasis.