• Internal medicine · Jan 2008

    Case Reports

    Cerebellar hemorrhage provoked by combined use of nattokinase and aspirin in a patient with cerebral microbleeds.

    • Yung-Yee Chang, Jia-Shou Liu, Shung-Lon Lai, Hsiu-Shan Wu, and Min-Yu Lan.
    • Department of Neurology, Chang Gung Memorial Hospital-Kaohsiung Medical Center, Chang Gung University College of Medicine, Kaohsiung, Taiwan.
    • Intern. Med. 2008 Jan 1;47(5):467-9.

    AbstractNattokinase is used as a health-promoting medicine for preventing thrombosis due to its fibrinolytic activity. Cerebral microbleed is remnant of blood extravasations from the damaged vessels related to cerebral microangiopathies. We report a patient, having used aspirin for secondary stroke prevention, who had an acute cerebellar hemorrhage after taking nattokinase 400 mg daily for 7 consecutive days. In addition to the hemorrhagic lesion, multiple microbleeds were demonstrated on brain MR images. We suggest that nattokinase may increase risk of intracerebral hemorrhage in patients who have bleeding-prone cerebral microangiopathy and are receiving other antithrombotic agent at the same time.

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