Shock, anaphylaxis, facial & laryngeal edema, feeling of suffocation, serum sickness-like reactions, conjunctivitis, stomatitis, SJS, TEN, exfoliative dermatitis, erythema multiforme & nodosum, acute & fulminant hepatitis, cholestasis, hepatic & cardiac failure, jaundice, increased amylase, acute enterocolitis, bloody diarrhea, hemorrhagic & pseudomembranous colitis, melena, pancytopenia, granulocytopenia, leukopenia, thrombocytopenia, ITP, hemolytic anemia, acute resp & renal failure, asthmatic attack (drug-induced), eosinophilic & idiopathic interstitial pneumonia, fever, disseminated intravascular coagulation, upper GI bleed, peptic ulcer, ileus, loss of consciousness, allergic vasculitis, chest pain, MI, HTN, involuntary movements & rhabdomyolysis.