Severe hypertension, recent stroke, cerebral neoplasm, recent history of peptic ulcer disease, ulcerative colitis, pancreatitis, subacute bacterial endocarditis, coagulation defects also due to liver or kidney disease, recent surgery, childbirth. Hypersensitivity, increased risk of cerebral bleeding, trauma. Pregnancy. Active internal bleeding, bleeding GI lesions. Arteriovenous malformation or aneurysm; recent (within 10 days) facial or head trauma, intracranial or intraspinal surgery, More than 5 days and less than 12 months since previous Streptokinase therapy.