Pseudomembranous colitis; anaphylactic shock & reaction, hypersensitivity; dizziness, somnolence, sedation, headache; dyspnoea; enterocolitis, melaena, diarrhoea, vomiting, abdominal pain, dyspepsia, nausea; angioedema, urticaria, dermatitis, rash, pruritus; fatigue, malaise. Ampicillin: Agranulocytosis, hemolytic anaemia, thrombocytopenic purpura, thrombocytopenia, leukopenia, neutropenia, eosinophilia, anaemia; convulsion; glossitis, stomatitis, tongue discolouration; cholestasis, hepatic cholestasis, bilirubinaemia, abnormal hepatic function, jaundice; toxic epidermal necrolysis, Stevens-Johnson syndrome, erythema multiforme, exfoliative dermatitis; tubulointerstitial nephritis; abnormal platelet aggregation, increased ALT & AST.