Purpura, bruising, hematoma, epistaxis, hematuria, intracranial bleeding, GI bleeding, neutropenia, aplastic anemia, thrombocytopenia, headache, dizziness, paresthesia, vertigo, dyspepsia, abdominal pain, diarrhea, nausea, gastritis, flatulence, constipation, vomiting, gastric & duodenal ulcer, prolonged bleeding time, reduce platelet count, rash, pruritus, leucopenia, neutropenia, eosinophilia, thrombotic, thrombocytopenic purpura, severe thrombocytopenia, granulocytopenia, agranulocytosis, anemia, aplastic anemia/pancytopenia, anaphylactoid reactions, confusion, hallucination, taste disturbances, vasculitis, hypotension, bronchospasm, colitis, pancreatitis, hepatitis, angioedema, dermatitis bullosa, erythematous rash, urticaria, eczema, lichen planus, arthralgia, arthritis, glomerulonephritis, fever, impaired liver function, increase blood creatinine level.