The most frequently reported adverse effects with cilostazol include headache, diarrhea, abnormal stools, and palpitations.
Infections and infestations: Infection.
Blood and lymphatic system disorders: Agranulocytosis, anemia, aplastic anemia, bleeding tendency, bleeding time prolonged, ecchymosis, granulocytopenia, leukopenia, pancytopenia, thrombocythemia, thrombocytopenia, increased eosinophils.
Immune system disorders: Allergic reaction, anaphylaxis, angioedema.
Metabolism and nutrition disorders: Anorexia, diabetes mellitus, edema (peripheral, face), hyperglycemia, hyperuricemia.
Psychiatric disorders: Anxiety.
Nervous system disorders: Abnormal dreams, cerebral hemorrhage, cerebrovascular accident, dizziness, dull headache, hypoesthesia, insomnia, intracranial hemorrhage, paresis, sleepiness, tremor, vertigo.
Eye disorders: Conjunctivitis, eye hemorrhage, retinal hemorrhage.
Ear and labyrinth disorders: Tinnitus.
Cardiac disorders: Angina pectoris, arrhythmia, atrial fibrillation, congestive heart failure, myocardial infarction, nodal arrhythmia, supraventricular extrasystoles, supraventricular tachycardia, syncope, tachycardia, Torsades de pointes and QTc prolongation in patients with cardiac disorders (e.g., complete atrioventricular block, heart failure, and bradyarrhythmia), ventricular extrasystoles, ventricular tachycardia.
Vascular disorders: Epistaxis, hemorrhage (unspecified), hot flushes, hypertension, hypotension, orthostatic hypotension, subacute stent thrombosis.
Respiratory, thoracic and mediastinal disorders: Cough, dyspnea, interstitial pneumonia, pharyngitis, pneumonia, pulmonary hemorrhage, respiratory tract hemorrhage, rhinitis.
Gastrointestinal disorders: Abdominal distention, abdominal pain, diarrhea, dysguesia, dyspepsia, flatulence, gastritis, gastrointestinal hemorrhage, heartburn, melena, nausea, vomiting.
Hepatobiliary disorders: Hepatic dysfunction/abnormal liver function tests, hepatitis, jaundice, increases in: alkaline phosphatase, aspartate aminotransferase (AST), alanine aminotransferase (ALT), lactate dehydrogenase (LDH).
Skin and subcutaneous tissue disorders: Alopecia, eczema, photosensitivity, pruritus, rash, skin drug eruption (dermatitis medicamentosa), skin eruptions, Stevens-Johnson syndrome, toxic epidermal necrolysis, urticaria, subcutaneous hemorrhage.
Musculoskeletal and connective tissue disorders: Muscle hemorrhage, myalgia.
Renal and urinary disorders: Hematuria, pollakiuria, renal failure, renal impairment.
General disorders and administration site conditions: Asthenia, chest pain, chills, generalized edema, malaise, pain, pyrexia, sweating, weakness.
Investigations: Increases in blood creatinine, blood glucose, blood pressure, blood urea nitrogen, uric acid level; decrease in blood pressure.
Injury, poisoning and procedural complications: Extradural hematoma, subdural hematoma.