Abdominal pain, pseudomembranous colitis, esophagitis, nausea, vomiting, diarrhea; generalized mild to moderate morbilliform-like (maculopapular) skin rashes; pruritus, vaginitis; jaundice, hepatic damage, liver function tests abnormalities; transient neutropenia (leukopenia), eosinophilia, agranulocytosis, thrombocytopenia.