CDAD & colitis/pseudomembranous colitis, nausea, vomiting, diarrhea, abdominal pain/cramps, tenesmus, flatulence, bloating, anorexia, wt loss, esophagitis, esophageal ulcers; generalized mild to moderate morbilliform-like (maculopapular) skin rashes, rash, urticaria, pruritus, fever, hypotension, anaphylaxis/anaphylactoid reactions; erythema multiforme, SJS; exfoliative & vesiculobullous dermatitis, vesiculobullous rashes, serious cutaneous adverse reaction, TEN, acute generalized exanthematous pustulosis, DRESS; jaundice, hepatic damage, transient increases in serum bilirubin, alkaline phosphatase, AST; azotemia, oliguria, &/or proteinuria, abnormalities in LFTs; vag infection/vaginitis; transient neutropenia (leukopenia), eosinophilia, thrombocytopenia, & agranulocytosis; leukocytoclastic angiitis; polyarthritis; dysgeusia; lymphadenitis.