<prompt> The microsomal enzyme involved in the metabolism of omeprazole isCYP 2ACYP 2C19CYP 2C8CYP 2B  <response>: Omeprazole and clopidogrel are mainly metabolized by CYP2C19.Other drugs metabolized by this enzyme are anti anxiety drugs like diazeoam. Induced by drugs rifampicin and barbituates. Ref: KATZUNG; 13th ed Page: 80 