Constipation, heartburn, abdominal pain, nausea; headache, drowsiness, dizziness; tinnitus; pruritus, skin eruptions or rashes, ecchymoses. Dyspepsia, diarrhea, stomatitis, vomiting, anorexia, flatulence; vertigo, lightheadedness, inability to concentrate, mental depression, nervousness, irritability, fatigue, malaise, insomnia, sleep disorders, dream abnormalities; hearing or visual disturbances; thrombocytopenia, leukocytopenia, granulocytopenia, eosinophilia; inhibit platelet aggregation, prolong bleeding time.