Eligibility Criteria

Inclusion Criteria

At least one reversible cerebral or retinal ischemic attack of less than 72 hours duration occurring within 1 month of hospital admission, < 75 years of age.

Exclusion Criteria

Severe residual symptoms from a previous stroke, bad physical condition due to other illness, history of bleeding peptic ulcer or active peptic ulcer, hypersensitivity to ASA, already taking ASA or platelet inhibiting drugs, patients referred to carotid surgery.