Do not use in patients w/ active intravascular clotting. Patients w/ hematuria, predisposition to thrombosis. Hemorrhage due to disseminated intravascular coagulation. Lysis of existing extravascular clots may be inhibited. Perform regular eye exam & liver function tests in long-term therapy. Increased incidence of cerebral ischemic complications when given after subarachnoid hemorrhage. Adverse effects associated w/ rapid IV dosage. Renal impairment.