Abstract:Objective To explore the role of Aspirin with Clopidogrel in secondary prevention of stroke in moderate and severe vertebral artery origin stenosis (VAOS). Methods Ninety-four cases of moderate and severe vertebral artery origin stenosis were divided into double antiplatelet group (n = 50, receiving combined Aspirin with Clopidogrel) and mono antiplatelet group (n = 44, receiving Aspirin or Clopidogrel alone). The mRS score, the NIHHS score and recurrent stroke, poor prognosis and death number were collected. Results The rates of poor prognosis and recurrent stroke in the double antiplatelet group were 4.0% and 2.0% respectively, which were significantly lower than those in the mono antiplatelet group (13.6% and 18.2% respectively, P < 0.05). There was no statistical difference in the mortality or hemorrhage rate between both groups (P > 0.05). Conclusions A combination of Aspirin and Clopidogrel is more effective and safer than Aspirin or Clopidogrel alone in secondary prevention of stroke in moderate and severe vertebral artery origin stenosis.