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Objective:  To explore the treatment effect of statins used together with clopidogrel on cerebral infarction (CI).    Methods:  One hundred and thirty non-clopidogrel resistant patients were divided into a dynamic clopidogrel resistant (DCR) group and a continuous Non clopidogrel resistance (NCR) group. Patients were randomly assigned to AC group (atorvastatin 40 mg/d + clopidogrel, 51 patients) and RC group (rosuvastatin 20 mg/d + clopidogrel, 47 patients). The patient’s platelet aggregation rate (PAR) was measured on visit 0 (baseline), visit 1 (1 week after clopidogrel alone treatment), and visits 2 to 4 (one, three, and 6 months after clopidogrel plus statins treatment). The platelet reactivity index (PRI) was assessed on visits 0, 2, and 4, and clopidogrel thiol metabolite (H4) levels was measured on visits 2 and 4. DNA sequencing was used to determine  CYP3A4 ,  CYP2C9 , and  CYP2C19  genotypes in all patients.    Results:  PAR, PRI, and H4 levels, DCR ratio, and the genotype frequencies of  CYP2C9*3εC ,  CYP2C19*2εA , and  CYP2C19*3εA  of both groups were similar ( p  > 0.05).  CYP2C19εA  *2 and *3 were independent risk factors for DCR ( p  < 0.05).    Conclusion:  Clopidogrel combined with atorvastatin does not affect platelet inhibition and does not increase the incidence of DCR. The incidence of DCR in the Chinese population is high and is related to  CYP2C19εA.

The Dynamic Effect of Non-CYP3A4-Metabolized and CYP3A4-Metabolized Statins on Clopidogrel Resistance in Patients With Cerebral Infarction