Nausea, vomiting, diarrhea or epigastric pain. Palpitations & arrhythmia. Rashes & hypersensitivity reactions (eg, bronchospasm, angioedema, anaphylaxis) & cross-sensitivity to related drugs. Blood disorders eg, agranulocytosis, leukopenia, hemolytic anemia & thrombocytopenia. Convulsions, sweating, myalgia, paresthesias, extrapyramidal effects, tremor, sleep disturbances, depression, confusion, tinnitus, hypotension & hair loss.