Internal Medicine
Online ISSN : 1349-7235
Print ISSN : 0918-2918
ISSN-L : 0918-2918
CASE REPORTS
Cerebellar Hemorrhage Provoked by Combined Use of Nattokinase and Aspirin in a Patient with Cerebral Microbleeds
Yung-Yee ChangJia-Shou LiuShung-Lon LaiHsiu-Shan WuMin-Yu Lan
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JOURNAL OPEN ACCESS

2008 Volume 47 Issue 5 Pages 467-469

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Abstract

Nattokinase 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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© 2008 by The Japanese Society of Internal Medicine
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