Adult/elderly 75 mg as single daily dose.
Non-ST segment elevation acute coronary syndrome (unstable angina or non-Q-wave MI) Initially 300 mg loading dose, then continued at 75 mg once daily (w/ ASA 75-325 mg daily).
ST segment elevation acute MI 75 mg as single daily dose initiated w/ 300 mg loading dose in combination w/ ASA (w/ or w/o thrombolytics).
Patient >75 yr Initiate w/o loading dose.
Atrial fibrillation 75 mg as single daily dose in combination w/ ASA 75-100 mg daily.