Inclusion Criteria - (i) had a clinical diagnosis of acute ischaemic stroke ,on the first episode within the previous 7 days, and confirmed on CT or MRI brain imaging.(ii) were between 18 to 80 years of age (patients >= 70 years were not combined with any other poor physical condition except ischaemic stroke )(iii)had a score of 5-22 on the National Institutes of Health Stroke Scale (NIHSS).(iv)had a report that liver and kedney function were less than 1.5 folds of normal value.
Exclusion Criteria - (i) had other intracranial pathologies (e.g. cerebral hemorrhage, tumour, infection), (ii) were pregnant or nursing ;(iii) had a neurological or psychiatric disease ;(iv) had significant drug or alcohol misuse, (v)had been given thrombolytic therapy or medication forbidden by study protocol; (vi)participated in a clinical trial in the past 3 months.